Laura Robson and Andy Murray are both in action on Day Five of the US Open, and the two Brits could hardly have more contrasting matches.
Robson launches proceedings in the full glare of Arthur Ashe Stadium against sixth seed Li Na.
Robson announced herself on the world stage with stunning victories over Na and Kim Clijsters at Flushing Meadows last year.
It still looks a tough match for the British star - Na very rarely loses to someone when the favourite. Consistent - dull even - the Chinese should be too strong. But with Robson, you never know. If she can get her booming serve going, and Na does have a rare off day - as she did last year - anything is possible.
Robson said: "I remember being so nervous when I walked on court but just fighting through that and sticking with her.
"I think she made a lot of mistakes in the first set, which helped quite a lot. Hopefully she'll do that again. It should be a good match."
Novak Djokovic is on next - he should not have too much trouble with German journeyman Benjamin Becker and then there is an intriguing clash between Sloane Stephens and Jamie Hampton, the two great hopes of American tennis.
The evening session on Ashe starts with a cracker - Lleyton Hewitt against Juan Martin del Potro. Del Potro - who is in Djokovic's quarter - should go deep in New York but he was awful in his first round win over Guillermo Garcia Lopez and the Aussie veteran Hewitt will give him another test.
Serena Williams will be given her first proper match when she takes on the talented Yaroslava Shvedova in her third round match. The Kazakh should have beaten Williams at Wimbledon last year, losing a thriller 7-5 in the third so this could be a decent match.
On Louis Armstrong, Agnieszka Radwanska gets play underway against Anastasia Pavlyuchenkova - and that could be a tough game for the Polish third seed.
Russian Pavlyuchenkova's world ranking of 33 is misleading. She has been as high as 13 and looks back to her awesomely powerful best after a lean spell.
Tomas Berdych - Murray's likely quarter-final opponent - follows, and the big Czech should not have any trouble against Denis Kudla. And then it's Murray against Leonardo Mayer.
Elsewhere, Martina Hingis - whose main job is coaching Pavlyuchenkova - returns to grand slam action for the first time in six years. She competes in the women's doubles and mixed doubles today. She is playing in the mixed with doubles legend Mahesh Bhupathi who, at the age of 39, is playing in his last grand slam.
Brit doubles hopefuls Colin Fleming and Jonathan Marray - seeded 12 - are also in action in their second round meeting with Ryan Harrison and Robert Lindstedt. And Jamie Murray and his Aussie partner John Peers - who are in excellent form - tackle Feliciano Lopez and Andre Sa.
Fleming has a busy day - he is also playing mixed doubles with Nuria Llagostera Vives. And Heather Watson partners Vera Dushevina in the women's doubles.
Live coverage starts at 4pm this afternoon on Sky Sports 3HD.