Novak Djokovic is stunned in Madrid

Grigor Dimitrov stunned Novak Djokovic in the second round of the Madrid Open on Tuesday, beating the top-ranked Serb, 7-6 (6), 6-7 (8), 6-3, for the biggest win of his career.

The 28th-ranked Bulgarian saved three set points in the first before taking the lead, and Djokovic then appeared to hurt his right ankle while trailing 4-2 in the second.

Djokovic, who ended Rafael Nadal’s eight-year winning streak at the Monte Carlo Masters last month, said the loss had more to do with poor preparation than an injury.

“I didn’t prepare myself so good,” Djokovic said. “For 12 days after Monte Carlo I haven’t touched the racquet.”

Earlier, defending champion Roger Federer looked comfortable on clay in his first match in two months, easing past Radek Stepanek of the Czech Republic, 6-3, 6-3, to reach the third round, and defending champion Serena Williams moved into the third round by beating Lourdes Dominguez Lino of Spain, 6-2, 7-5.

ETC.: Wuerffel, Frazier, Dayne in College Football Hall of Fame

Quarterbacks Danny Wuerffel and Tommy Frazier, along with Heisman Trophy winner Ron Dayne, highlighted the latest College Football Hall of Fame class of 12 players and two coaches announced by the National Football Foundation.

The rest of the players to be inducted in Manhattan are: Miami Heisman winner Vinny Testaverde, whose selection was announced Monday; Ted Brown of North Carolina State; Tedy Bruschi of Arizona; Jerry Gray of Texas; Steve Meilinger of Kentucky; Orlando Pace of Ohio State; Rod Shoate of Oklahoma; Percy Snow of Michigan State; and Don Trull of Baylor.

The new Hall of Fame coaches are Wayne Hardin, who led Navy and Temple, and Bill McCartney of Colorado.

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Russia got two late goals to beat the United States, 5-3, and Canada scored four unanswered goals en route to a 7-1 rout of Norway at the ice hockey world championships in Helsinki, Finland. The Americans gave the defending champions their toughest test yet at this year’s tournament, leading 3-2 after two goals from captain Paul Stastny and one from Matt Hunwick.

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Penske Racing celebrated a small victory when NASCAR’s chief appellate officer issued a mixed ruling on penalties levied against the team. Although most everything was upheld, suspensions for seven key employees were reduced from six points races to two. Team owner Roger Penske said he was “very happy with the outcome.”

NASCAR inspectors confiscated parts from the rear suspensions of the cars of defending champion Brad Keselowski and Joey Logano before the April 13 race at Texas. NASCAR alleged the parts were not approved, while Penske maintained the parts had been approved but the organization was applying them in a way that fell in a gray area of the rule book.

NASCAR also said that Ryan Newman will not be fined for his rebuke of NASCAR on live television following a late accident at Talladega last weekend.

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The Phoenix Suns have hired Boston Celtics executive Ryan McDonough as their general manager. The 33-year-old McDonough replaces Lance Blanks, who was fired April 22 after failing to take the Suns to the playoffs in three seasons.

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Police in Scottsdale, Ariz., are investigating Suns forward Michael Beasley in connection with an alleged sexual assault in January. A spokesman says police are interviewing those involved and processing any physical evidence to determine if criminal charges are appropriate. More details weren’t available.

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The Buffalo Sabres hired Ron Rolston as head coach after he served the interim position following the firing of Lindy Ruff in February. Rolston led the Sabres to a 15-11-5 record after Ruff was fired Feb. 20 following a 6-10-1 performance.

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The Dallas Cowboys signed quarterback Aaron Corp, twice released by Buffalo after joining the Bills as an undrafted free agent last year. Corp played at Orange Lutheran and USC before transferring to Richmond in 2010.

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The Kansas City Chiefs have hired longtime Chicago Bears personnel man Chris Ballard to be their director of player personnel.

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Texas Longhorns pitcher Corey Knebel was suspended from the team last week because he substituted his urine sample for a teammate’s to prevent the teammate from failing a drug test. And Knebel’s urine sample failed the test.

According to the Austin American-Statesman, Knebel agreed to let the unnamed teammate use his sample to avoid detection for having taken Adderall, which is used to treat ADHD and is on the NCAA’s banned list of substances. Knebel’s test failed for Adderall. Knebel has a prescription for it, his teammate doesn’t. His teammate admitted it was Knebel’s urine after he failed the test.

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FIFA again expressed its concern with Brazil’s preparations for the 2014 World Cup after local organizers said they are facing challenges to meet the deadline for the stadium that will host the tournament’s opening game in Sao Paulo. A day after one of the engineers in charge of the stadium’s construction said the venue is not expected to be fully ready by December as FIFA wants, local organizers said they are “looking for solutions” to speed up construction and finish the work on time.

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Chivas USA traded forward Juan Agudelo to the New England Revolution for allocation money. Agudelo, acquired last season from New York, had two goals this season to lead Chivas USA.

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Dejan Udovicic has been named head coach of the U.S. men’s national water polo team through the 2016 Olympic Games. Udovicic led Serbia to a bronze medal at the 2012 Games.

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Enrico Battaglin of Italy sprinted to victory on rainy, cobbled streets of Serra San Bruno, Italy, in the fourth stage of the Giro d’Italia as compatriot Luca Paolini kept the overall lead.

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Oakland (Mich.) University is moving to the Horizon League from the Summit League.