Melbourne, Australia (SportsNetwork. Hector Bellerin Jersey .com) - Serena Williams quest for an 18th career singles Grand Slam title will have to wait a few more months. The world No. 1 will have to start a new winning streak too. Serbian Ana Ivanovic stunned Williams, 4-6, 6-3, 6-3 Sunday to reach the quarterfinals of the Australian Open. The 14th-seeded Ivanovic ended Williams 25-match winning streak and dealt the American a shocking fourth-round exit. Ivanovic, who was the runner-up in Melbourne in 2008 and was the French Open champion later that year, took advantage of 31 unforced errors from Williams. "Its not easy playing such a champion and Ive never beaten her before," Ivanovic said during an on-court postmatch interview. Before this match, Ivanovic had lost all four previous matchups against Williams. In fact, she hadnt taken a set against her, but that all changed at Rod Laver Arena. A five-time Australian Open champion, Williams lost for just the second time in 53 matches at the event when winning the first set. Her only previous defeat came last year in the quarterfinals to Sloane Stephens. Williams fought back from a break down to win the first set, but in the second Ivanovic broke for a 3-2 edge. She finally finished off the set on her third chance, a forehand winner. "I had some confidence coming into todays match," Ivanovic said. "I really did certain things extremely well, you know, and I kept her under pressure I felt throughout the whole match." The errors then started to pile up for Williams, as she lost the first three games of the final set. Williams held serve to get within 5-3 and saved one match point when Ivanovic sent a forehand into the net. The encounter finally ended when Williams sent a return long. "I wasnt the best, but it was all Anas day. I thought she played really well," said Williams, who fired 13 aces. "I made a tremendous amount of errors. Im just not used to missing those shots." Williams has been dealing with a back injury, which she termed as not "life threatening" but said she was unable to get additional days off due to the schedule of playing essentially every other day as a Grand Slam tournament requires. She even contemplated not taking the court Sunday due to the injury, but gave Ivanovic all the credit for winning. "I think its almost good I lost today because now I know what I have to work on," added Williams, who pulled out of the doubles competition with her sister, Venus before their first-round match. That was because Venus had a lower left leg injury. Ivanovic will face either 30th seeded Canadian Eugenie Bouchard or Australian Casey Dellacqua in the quarterfinals. Only three players have won 18 Grand Slam singles titles in the Open Era - Chris Evert (18), Martina Navratilova (18) and Steffi Graf (22). Serenas next chance at No. 18 will come at the French Open at the end of May. Fourth seed Li Na of China bested 22nd-seeded Russian Ekaterina Makarova, 6-2, 6-0 in 59 minutes. Li, who lost to Victoria Azarenka in last years finale in Melbourne, will face Italian Flavia Pennetta in the quarterfinals. The 28th-seeded Pennetta, who did not play the 2013 Australian Open due to a wrist injury. upended No. 9 seed Angelique Kerber of Germany, 6-1, 4-6, 7-5. This is Pennettas first quarterfinal appearance at the Aussie Open, but her second straight such showing in a Grand Slam tournament. Pennetta, who fired eight aces, was ousted by Azarenka at the 2013 US Open semifinals. Since 1999, only one German player has advanced to the Australian Open quarterfinals. That was Andrea Petkovic in 2011. Custom Arsenal Jerseys . -- David Price didnt think he would be in Port Charlotte this spring. Nacho Monreal Arsenal Jersey . Canada was placed in one of the easiest groups during Saturdays live televised draw in Montreal. http://www.footballarsenalstore.com/Women-Lucas-Torreira-Arsenal-Fc-Jersey/ .C., won gold in the womens 200-metre backstroke, and Dominique Bouchard of North Bay, Ont.RALEIGH, N.C. -- After turning Tobacco Road into "Raleigh Top," Tennessee is headed to the round of 16. Tennessee denied Mercer a second straight upset in decidedly one-sided fashion, routing the Bears 83-63 in the third round of the NCAA tournament on Sunday night behind 17 points and a career-high-tying 18 rebounds for Jarnell Stokes. Josh Richardson had a career-high 26 points and Antonio Barton had 18 for the 11th-seeded Vols (24-12), who are making the most of their first tournament appearance since 2011. "NIT two straight years, I guess thats what youd call starting from the bottom," Stokes said. "A lot of people doubted us, and that just makes the ride much better." The Tennessee band had plenty of chances to blare their beloved "Rocky Top" during this rout, which followed the same script as their 19-point thumping of Massachusetts two days earlier: The Voles outrebounded Mercer 41-19 to keep the Southeastern Conference perfect in the tournament. They joined Florida and Kentucky in the regional semifinals -- the first time three SEC teams made it that far since 2007. "Ive been hearing that the SEC has been a football conference for a long time but I dont know how you can still say that when youve got three SEC schools in the Sweet 16," Tennessee guard Jordan McRae said. Tennessee will face second-seeded Michigan (27-8) in a Midwest Regional semifinal Friday night in Indianapolis. Stokes broke his 2-day-old school tournament record for rebounds. Langston Hall had 15 points to lead the 14th-seeded Bears (27-9). They knocked off Duke in the signature upset of the tournament but couldnt answer Tennessees size. "I think hopefully by the time (reality) sets in, well all be able to put a smile on and realize that what weve been able to do at our school, and for the city, has been phenomenal," forward Jakob Gollon said. "Its kind of hard to see right now." Mercer trailed by double figures for the entire second half before the Bears threatened another fantastic finish. They had the ball down 12 with about 2 1/2 minutes left when Gollon -- one of the heroes of the Duke upset two days earlier -- threw the ball away in the lane, then fouled out a few seconds later. McRae hit two free throws, and Richardson added a ffast-break layup to push the Tennessee lead to 77-61 with 1 1/2 minutes left. Konstantinos Mavropanos Arsenal Jersey. McRae finished with 13 points for the Volunteers, who have won eight of nine with the only loss coming to the top-ranked Gators in the SEC tournament. They are in the round of 16 for the fourth time in eight years, and the third team to go from the First Four to the Sweet 16 since the introduction of the extra round in 2011. They also got a bit of payback: Mercer ended Tennessees season last year with a 75-67 win in the first round of the NIT. Ike Nwamu scored 12 points, Anthony White Jr. had 11 and big man Daniel Coursey added 10 for Mercer, the plucky Atlantic Sun Conference school trying to match Florida Gulf Coasts run last year to the regional semifinals. The Bears drew a perfect matchup for their first game -- and couldnt have had a worse one for their second. "Any time we have Jeronne (Maymon) and Jarnell wearing Tennessee orange," McRae said, "we always feel like we have the advantage." They were bigger, more experienced and more precise than a Duke team loaded with high school All-Americans and a leaky defence, carving them up down the stretch in a 78-71 victory that ranks among the top upsets in the history of the tournament. Mercer starts five seniors and has seven on the roster -- but the Bears were down one with 6-foot-11 Monty Brown out with a possible concussion. Even with him, a Tennessee team with Stokes -- who set the schools short-lived tournament record with 14 rebounds in that 86-67 rout of UMass -- was going to be a challenge. Without him, it was nearly impossible. "Its hard to match up with them, but at the end of the day, mainly it was probably my fault towards the end," Coursey said. "They had a lot of rebounds, and I should have boxed them out." Tennessee never trailed and held a 24-4 rebounding advantage in the first half. Richardson scored 10 straight points midway for the Volunteers to turn a tight game into a double-figure lead. His 3 from the right wing made it 29-18 with 6 1/2 minutes left. Meanwhile, Stokes and Maymon effectively turned Mercer into a jump-shooting team: The Bears managed just one offensive rebound in the first half and didnt attempt their first free throw until there was just 8:40 left. ' ' '