Nick's Picks For Day 8

© Getty ImagesFederer has a 21-2 winning record over Roddick.

Legendary tennis coach Nick Bollettieri offers his commentary and prediction for two of the hottest matches on Monday’s schedule.

[3] Roger Federer vs. [31] Andy Roddick
This one will be watched by a lot of people. Remember it was only a few years ago that these two guys were playing each other in Grand Slam finals. It would mean the world to Roddick if he could play an outstanding match and win this. But you noticed that when Federer played Ryan Harrison he came out immediately—serving, volleying, short balls, attacking, coming in, drop shots. Roddick cannot afford to get into rallies that last more than a few shots. Roddick has to go out, play an aggressive game, and if he goes down he has to go down swinging. He should play like he’s playing for the Davis Cup. Pay attention to the first three or four games. If Roddick doesn’t get into the match early, this could be very lopsided.

NICK’S PICK: Federer in 2 sets

[6] Sam Stosur vs. [10] Serena Williams
This is an incredibly interesting match. The last time these two girls met was in the US Open final and nobody expected the result. Serena only won a handful of games. But now Serena is more acquainted with that dangerous kick serve of Stosur. In New York, it was Stosur’s kick serve and heavy forehand that caught Serena off balance. This time you won’t see Serena waiting on the baseline for the serve. She’ll move in and attack that thing. Serena has confidence now after two good wins and Stosur is coming off a very wobbly win the other night against Scheepers. I don’t think Stosur is going to overwhelm Serena like she did last time. We’re seeing a different Serena and we’ll see a different result.

NICK’S PICK: Williams in 2 sets.