Dominic Thiem landed our second quarter bet by beating David Goffin in four sets yesterday but now he has to face Novak Djokovic. The world number one eased past Tomas Berdych who again cracked under the merest of pressure. The Czech is living proof that sport at this level largely comes down to what’s between the ears.

As indicated nearly two weeks ago, I think Thiem can give Djokovic something to think about. The Austrian was not at his best against Goffin but he does have a happy knack of finding his way out of tricky situations. Given our position on Thiem outright at 50-1 each-way, there is no need to go in again and I suspect the Serb will prove too strong in the end. If you’re not on Thiem outright, I think 8-1 is verging on insulting about a player who has shown himself to be a seriously effective performer on clay.

It’s make or break for our each-way outright bet on Andy Murray too as he faces Stan Wawrinka who did as he pleased against Albert Ramos. Murray was erratic early on against Richard Gasquet but the Frenchman soon capitulated although, it has to be said, the Scot played some fine stuff in the third and fourth sets.

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I can see this going one of two ways - the defending champion getting on top early and staying on top with Murray unable to haul himself out of a mental rut, or the Pride of Dunblane prevailing in a struggle. At the prices, the Swiss to win in straight sets looks to be the play but it isn’t a match I want to get too heavily involved in.
Stan Wawrinka to beat Andy Murray in straight sets - 1pt @ 11/2
Kiki Bertens has given us some fun this fortnight having been tipped up each-way at 300-1 to win the tournament. If only we had been on the Dutchwoman to win her quarter (66-1 to do so apparently) and if only it wasn’t Serena Williams standing between her and the final. Yulia Putintseva was a set and a break up against the world number one but Williams then turned it on and came through a tough second set before cruising home.

I would give Bertens a chance were it not for her clearly feeling the effects of a long two weeks. Her calf was heavily strapped against Timea Bacsinszky and she admitted afterwards that she is struggling physically. Unless Williams has failed to recover fully from that win over Putintseva - and at 34 it is possible - I cannot see anything but a comfortable win for the defending champion and we’ll wheel out our first set 6-0 and 6-1 bets one last time.

Garbine Muguruza faces Sam Stosur in the other semi and, at the prices, I am inclined to back the Australian who has been revitalised at Roland Garros after a couple of years in the doldrums. The Spaniard showed some vulnerability against Shelby Rogers which Stosur could exploit if her serve is working well. I think ‘Bam Bam’ will get chances on Muguruza’s serve and this is closer than the odds suggest.
Serena Williams to win first set 6-0 v Kiki Bertens - 1pt @ 14/1
Williams to win first set 6-1 v Bertens - 1.25pts @ 6/1
Sam Stosur to beat Garbine Muguruza - 2pts @ 5/2