ATP Mercedes Open, Semi Final: Federer v Thiem (11:00)

Head to heads are  1-1. Both matches were  in 2016. Thiem won on clay when Federer was not 100% and Federer won in January on a hard court.

Federer is the better grass player but clearly still isn’t totally fit. He lost a set to Fritz and beat Florian Mayer in 2 tie breaks.

I had expected Thiem to be tired this week. He has played a lot of tennis recently. The fact that he has got to the weekend again says a lot about his fitness. Groth was beaten in 2 tie breaks and Youzhny took a set from him.

I’m not really sure about this one. Federer should win and his experience on grass is hugely superior but with both players below their best for different reasons we could see an interesting match.

I wouldn’t want to back Federer before he gets broken. If he is and you back him, remove liability if he breaks back.

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