The US Open quarter-finals got underway last night and last year’s surprise finalist Roberta Vinci could not repeat her amazing run of 2015 losing against second seed and Australian Open champion Angelique Kerber 7-5 6-0.

At the time of writing Gael Monfils (Advised 200/1 Ante Post now short as 20/1) was due to face compatriot and 22nd seed Lucas Pouille, who shocked fourth seed Nadal on Sunday night. Hopefully by the time you read this Monfils will be through to the semi-finals, where he will face either top-seed Djokovic or fifth seed Tsonga, who were due to play the night match in the early hours of this morning GMT.

If you followed my advice to back Monfils I would advise cashing out for a profit if he faces Djokovic, but if he faces compatriot Tsonga, I advise waiting and cashing out in play for a better profit if he goes a set-up, 2-1 or a break up in fifth set. Del Potro (advised 22/1) is also through to the quarter-finals and will face third seed Wawrinka tonight. He leads the head-to-head 4-2, has won the last four, including in four sets at Wimbledon this season, and I’m confident he can continue this trend and make it through to the semi-finals, where he will face either second seed Andy Murray or sixth seed Nishikori, who play later tonight.