Britain's Andy Murray backed compatriot Laura Robson to reach the top of the sport after the teenager's stunning US Open victory over three-time champion Kim Clijsters.
Robson, 18, the youngest player in the top 100, sent Clijsters into retirement with her 7-6 (7/4), 7-6 (7/5) win on the same Arthur Ashe court where she had been champion in 2005, 2009 and 2010.
Murray, who secured his place in the third round with a comfortable 6-2, 6-1, 6-3 win over Ivan Dodig of Croatia, saw Robson up close when they teamed up for a silver medal in mixed doubles at the Olympics last month.
"She moved very well today. You need to want to chase down the balls and believe you can get to the balls," said Murray.
"At the Olympics, she was moving much better than she had in the past. Today she moved very, very well. She hits the ball great when she's in a good position.
"I think if she keeps improving on her movement, she's going to be a very good player. She's very good already but she'll get to the top much quicker."
Murray was the first man into the third round where he will play on Saturday against either 30th seed Feliciano Lopez or Pablo Andujar, both Spanish, for a place in the last 16.