Roger Federer begins his Cincinnati Masters title defence against Denis Istomin.

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Federer will be hoping to build on his encouraging performance in Toronto last week where he made the final and came fairly close against Andy Murray. He won Cincinnati last year so needs a good run to hold on to his number two ranking.

Federer last played Istomin at the 2006 Australian Open, winning 6-2, 6-3, 6-2 but the Uzbek is now a much improved player and his serve and forehand are now serious weapons. He is ranked at a career high of 53 and came through qualifying over the weekend before impressively dispatching James Blake 6-3, 6-0.

However Federer should be too strong and it will be a major surprise if he does not win in straight sets.    

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