Well looks like finally the first reviews for Virtua Tennis are coming in.
http://www.metacritic.com/games/platforms/wii/virtuatennis2009
NGamer UK gave it 88 percent
and Gamers.at gave 81 percent
one bad thing: Gamers.at is actually not talking at all about the wii version and/or motion plus. As it is in German, I must tell you guys, that this is one more example why metacritic is sometimes big bs. The review considers itself multi-platform, but I strongly doubt that the reviewer ever had his hands on the wii-version.