NEW YORK -- Nick Monroe went tumbling over the wall and suddenly realized it was a long way down, the world moving in slow motion as he fell head first toward the concrete floor.The American doubles player was crumpled on the ground for more than five minutes during Sundays U.S. Open match, too dizzy to stand up. He was eventually able to walk back on court under his own power, and after passing a concussion test, he returned to finish out the last three games.In the third set of his match with Donald Young on the new Grandstand, Monroe chased after a volley hit at a sharp angle and slid into a knee-high barrier along the side of the court. He flipped over the wall, and on the other side, the base of the stands is lower than the court.Just saw the ball and ran for it, he said, and didnt realize the wall was there.Monroe added he was fairly certain he never lost consciousness and was aware of the score and the situation the whole time. Young climbed over the barrier to check on him and Monroe could hear what he was saying, but he was too dizzy to move for a couple of minutes.Their opponents, Spains Pablo Carreno Busta and Guillermo Garcia-Lopez, also came over to see if he was OK as medical staff attended to Monroe. He was then taken inside for close to 10 minutes for concussion tests as Young sat in his changeover chair and the Spaniards hit the ball back and forth to each other on court to stay warm.The 34-year-old Monroe said he was put through a series of balance tests and asked to recite the months and the days of the week backward, and he passed everything.The teams had split the first two sets and the Americans trailed 4-2 in the third when the incident happened. Monroe held in his next service game, but the Spaniards closed out the 4-6, 7-6 (4), 6-3 victory to reach the quarterfinals.Monroe said about an hour after the match that he was still a bit dizzy and medical staff wanted him to come back to the tennis center over the next few days to continue to check on him. Hes never had a concussion before.I guess in tennis you dont really hit your head anywhere, he said with a chuckle.Monroe called the accident just a freak thing.Youre just so in the moment, he said. You want to win that bad, and you see the ball and you just go get it. Wholesale Soccer Jerseys .com) - Manchester City midfielder David Silva is expected to miss the next four weeks because of a calf problem. Cheap Soccer Jerseys China . -- The proud fathers huddled near the Dallas Stars dressing room, smiling, laughing and telling stories while wearing replica green sweaters of their sons team. http://www.cheapsoccerjerseysbywholesale.com/ . 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SAN FRANCISCO -- As general manager Sandy Alderson stood in the visitors dugout at AT&T Park during batting practice on Thursday afternoon, a New York Mets fan in the crowd shouted at him, Bud Black! Bud Black, Sandy! Bud Black!Alderson turned his back and tried to conceal any visible reaction to the heckler, who was imploring the GM to hire Black, a free-agent manager.Alderson then told ESPN.com he is not currently contemplating any changes with Mets manager Terry Collins or his staff.Alderson would not offer a blanket guarantee they would survive the season, though.Do I ever make any statement unequivocally? Alderson said. There are no present plans to make any changes.After winning the National League pennant in 2015, the injury-depleted Mets are 60-60 this season as they open a four-game series against the San Francisco Giants. The Mets are only 13-19 since the All-Star break, which has dropped them four games beehind the St.ddddddddddddLouis Cardinals for the second wild-card spot.The Mets are getting some reinforcements soon. Justin Ruggiano (hamstring) was activated from the disabled list on Thursday, and?Yoenis Cespedes (quadriceps) and Asdrubal Cabrera (knee) are set to be activated Friday.Still, Neil Walker remains sidelined for a third straight game with a back injury. And the Mets have lost David Wright, Lucas Duda, Matt Harvey and potentially Juan Lagares for the season.Asked if observers, including the AT&T Park heckler, are being too harsh -- given the volume of the teams injuries -- Alderson replied: We all have an expectation of winning. None of us uses injuries as an excuse. Thats true inside the organization. Thats true for our fans, as well. Thats why I understand the frustration. 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