It has been noted by some observers that this year represents the year of change. Whether you accept that or not - there has been some changes in the tenis scene. Last year the grand slam champions for both men's and women's singles were as follows: AO Djokovic Sharapova FO Nadal Ivanovic Wimbledon Nadal V.Williams US Federer S.Williams This year the picture is diiferent. AO Nadal S.Williams FO Federer Kutznetsova Wimbledon Federer S.Williams US Del Potro Clijsters There are new champions from last year and i see this trend continuing. It will be interesting to see who picks up all 4 titles next year as the competition is getting stronger.