Interesting one. Isner and Federer should be full of confidence, and rightly so. This is a return match and an exciting rematch for the Davis Cup tie in Switzerland, which Isner won in hugely impressive style. I expect a close match that hinges on a few points with Roger finding a way to get it done. Isner certainly has his chances.
''clay imo, is his best surface.'' - a most objective opinion on Roger Federer.