Mardy Fish told USA Today he had a medical procedure called cardiac catheter ablation Wednesday to correct a heart problem. Fish hasn’t played since late March. Fish, ranked No. 10, is the highest-ranked American on the ATP Tour. He said he can resume light training soon . . . Stanford’s Nicole Gibbs rallied to beat teammate Mallory Burdette, 2-6, 7-6 (7-5), 6-3, and win the NCAA singles championship in Athens, Ga. Not long after, the two beat Georgia’s Chelsey Gullickson and Nadja Gilchrist for the doubles title . . . Steve Johnson of USC won his second straight NCAA singles title with a 6-4, 6-4 victory over Kentucky’s Eric Quigley, his 72d straight win. In the doubles championship, Chase Buchanan and Blaz Rola of Ohio State beat Texas Tech’s Raony Carvalho and Gonzalo Escobar, 7-6 (7-4), 6-3, to become the first pair to win all three collegiate majors in the same school year.

Serbia’s soccer association said midfielder Adem Ljajic was suspended from the national team for failing to sing the national anthem before a Saturday exhibition against Spain. The association said in a statement that Serbia’s new coach, Sinisa Mihajlovic, “sent Ljajic home’’ because he did not comply with his rules that stipulate players have to sing the anthem before matches. The statement said that Ljajic, who is Muslim, did not sing the anthem “because of his personal reasons.’’ Ljajic was involved in an incident earlier this month with his former Fiorentina coach, Delio Rossi, who slapped him as he returned to the bench after being substituted in a Serie A game. Ljajic had stuck his thumb up mockingly . . . Petr Cech signed a four-year contract with Chelsea, tying the Czech goalkeeper to the European champions until 2016.

Boxer Paul Williams was paralyzed from the waist down Sunday after being involved in a motorcycle crash in the Atlanta suburbs and doctors said it is unlikely he will continue his career, his manager, George Peterson, said. “He still believes he’s going to fight again,’’ Peterson said. Williams severed his spinal cord after falling when he was thrown from his motorcycle in Marietta, Ga., according to Peterson. The crash happened after Williams tried to avoid another car . . . Johnny Tapia, the five-time boxing champion whose turbulent career was marked by cocaine addiction, alcohol, depression, and run-ins with the law, was found dead Sunday night at his Albuquerque home. He was 45. Obituary, B12 . . . Dan Haugh drove in three runs and Kevin Foley had five hits as Wheaton advanced to the Division 3 national title game with a 13-9 win over St. Thomas (Minn.) in Grand Chute, Wis. The Lyons (41-9) play Marietta Tuesday before playing for the program’s first championship Wednesday . . . British Open champion Darren Clarke withdrew from next month’s US Open in San Francisco because of a groin injury . . . Alex Noren and Marc Warren led 11 qualifiers at Walton Heath, England in qualifying for the US Open, while past and present European Ryder Cup captains Colin Montgomerie and Jose Maria Olazabal failed to do so . . . Shackleford, the 2011 Preakness winner, won the $750,000 Metropolitan Handicap at Belmont Park, earning an automatic berth into the Breeders’ Cup Dirt Mile in November . . . Sean Rash won the Professional Bowlers Association’s Chris Schenkel Player of the Year award.