Andy Murray makes his return to singles action for the first time since his hip surgery at the Cincinnati Masters tennis.
The former world number one hasn't played a singles match since losing in the first round of the Australian Open in January.
He takes on Frenchman Richard Gasquet.
Meanwhile, Rafael Nadal has announced he will not compete at the Cincinnati Masters after winning the Rogers Cup in Montreal on Sunday.
The hard court season is underway ahead of the US Open which begins on August 26.