RIO DE JANEIRO -- The weight of expectation is a heavy burden for any young athlete predicted to scale to the pinnacle of her profession. It felt like that here Friday night, watching the talented young American Madison Keys go down in a hard-fought heap to German veteran Angelique Kerber, the battle-tested No. 2 seed in the womens Olympic tennis tournament.Keys, 21, having just slipped into the pro tours top 10 after a stellar summer, came to the semifinals after winning a pair of tight three-set matches. But this time, her power wasnt enough to pull her through. A simple narrative sat behind the 6-3, 7-5 score: mistakes. Keys came in flurries. All told, she struck 41 unforced errors, many coming at the worst moments.Im obviously not happy with that, she said later, tears welling in her eyes. Im disappointed, but [Kerber] played well. Its frustrating when you have 10 break points and dont convert one. Its tough also because she was playing so well. ... She is just not giving you anything.Kerber, 28, the 2016 Australian Open champion and Wimbledon runner-up, played with few misfires. She had only eight unforced errors in the match. To call it German efficiency would be both cliché and very true. She always seemed in the right spot. Late in the match, she fended off a series of break points that might have sent matters into a winner-take-all third set.Keys was devastated by this loss. Once the final point was done, she slammed a ball into the center-court seats. She covered her face with a towel while walking off the court. Speaking to reporters, her voice cracked, and she looked like she was about to cry. The Games mattered -- they mattered a lot.Still, Rio isnt over for her yet. Keys still has a bronze-medal chance. She faces off Saturday against a two-time Wimbledon singles champ, Czech Petra Kvitova. You can walk from this tournament and still be on a high, Keys said. That is what I am going to focus on.Rio, one can assume, will likely be a mere speed bump for the tall right-hander. Maybe it will add to the motivation that has fueled her steady improvement to No. 9 in the world, a rise that has many predicting greatness. The future looks bright. Her game is maturing at an opportune time. Serena Williams remains at the top of womens tennis, but at 34, she cant play forever, can she?Keys should end up leaving this electrified stage having taken another step toward joining Serena among the games best. Maybe Keys will one day scale to the pinnacle -- No. 1. The land Serena and, before that, sister Venus have so long owned.But the future can wait. Right now there is Saturday -- and the simple matter of a medal to be won.It would mean everything, Keys said. No matter what, I am going to go out and try to win the bronze. Cheap MLB Jerseys From China . 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The club announced the surgery following a 5-3 exhibition loss to the Columbus Blue Jackets. Jolyon Palmer was frustrated Renault did not implement a team order to let him pass Kevin Magnussen during the U.S. Grand Prix.Palmer spent much of the race bottled up behind teammate Kevin Magnussen and complained on several occasions that he should be let through. After opting against any risky moves Palmer held station behind his teammate, something he feels cost him the chance to challenge the cars ahead.I was on his gearbox for two-thirds of the race, Palmer told Sky Sports. We really were struggling to follow other cars. I couldnt get close enough to pass, I was always looking but not quite there. A couple of times I could have had a lunge but I think its quite silly to do that.I was pushing to get ahead and in the end I overheated my tyres trying to pass him and fell back a little bit, so he did an extra stop and came through at the end. It was a bit frustrating.When asked if he had been asking to pass Magnussen on the radio, he said: Yeah, basically. For us to get a result we need a really good position, we need a good strategy. Of course I dont want [team orders] to be the case, I want to be able to pass.ddddddddddddBut I spent 30 laps tucked up right behind him. I knew I was a lot quicker. I could see the guys in front and could see we could make some inroads, but I couldnt follow him close enough. I felt if Id got in front I could have really moved on and caught some of the guys ahead, but I was stuck behind.Palmer and Magnussen are fighting for the remaining seat at Renault alongside Nico Hulkenberg next season. The British drivers says approaches every races as if he is fighting for his seat.Im always driving for my future, its Formula One. I dont know whats happening [with 2017]. Im pushing hard to do the best I can, today was the same. Thirteenth isnt a disaster but I think it could have been better. Its just a shame.To be honest, I think we need to look at the start, my opening laps werent very strong. As much as I would have liked to have been let past, I started ahead anyway, so we need to look at the whole race. ' ' '