A year ago I would have rated the US Open as faster than Wimbledon but they have slowed down the US Open now. So it now seems: Australian Open - Slow Hard Court French Open - Clay court (by definition slow) Wimbledon - Slow Grass Court US Open - Medium Paced (used to be fast but now slower) Hard Court So in order of slowness Slow - French Open Slow - Australian Open Medium/Slow - Wimbledon/US Open about the same Interesting question is the Australian Open now slower than the French Open? (Martina N. said it was as slow and the percentage on return of service is slightly worse than the French Open) I'd say not yet - but are the Australian Open committee trying to get it that slow? I wonder what their strategy is there. So is the French Open no longer the slowest Grand Slam?