Yes I think so. I haven't been trading tennis long enough to really get a good understanding of what is going on, but it appears to me that emotion seems to be playing a big part. Prices seem to move much further than in the cold light of day they really should. This happens both before and during some of the games I have watched.
I don't want to give the impression trading tennis is easy however, you still have to be disciplined and trade to some kind of plan, but from my limited experience it is definitely easier than horse race trading.