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.

Afghanistan-Sri Lanka series in UAE postponed amid Middle East crisis
Iran say World Cup participation off table, Infantino insists they are welcome
Sinner edges into Indian Wells quarter-finals after beating Fonesca
Sabalenka defeats Osaka, Zverev reaches Indian Wells quarters
Bayern crush Atalanta as Atletico punish Tottenham errors
