Former champion Robin Haase suffered a shock exit to Paolo Lorenzi in the first round of the ATP Kitzbuhel tournament on Tuesday.
Maximo Gonzalez provided the biggest shock of the opening day of the ATP Kitzbuhel tournament by knocking out eighth seed Pablo Carreno-Busta.
Wimbledon semi-finalist Grigor Dimitrov has withdrawn from this week's ATP Washington Open after doctors diagnosed him with the flu and a sinus infection.
Top seed John Isner successfully defended his Atlanta Open title with a 6-3 6-4 victory over Israel's Dudi Sela in Sunday's final.
China's Peng Shuai was pushed all the way by youthful compatriot Liu Fangzhou as she won the inaugural International Women's Open 6-2 3-6 6-3 in Nanchang.
Qualifier Pablo Cuevas sealed his second ATP singles title of the month with a 6-3 6-4 victory over defending champion Tommy Robredo in the final of the Croatia Open in Umag on Sunday.
Pablo Andujar won his first title in more than two years after a straight-sets win over Juan Monaco at the Swiss Open final.
Uruguayan qualifier Pablo Cuevas continued his superb form by upsetting top-seeded Fabio Fognini 6-3 6-4 to reach the final of Croatia Open in Umag on Sunday.
Teenager Elina Svitolina successfully defended her Baku Cup crown with a straight-sets victory over Bojana Jovanovski in Azerbaijan.
Top seed John Isner powered his way into the final of the Atlanta Open for the fourth time in five years with a straight-sets victory over Jack Sock.
Torrential rain in Umag on Saturday forced the semi-finals of the Vegeta Croatia Open to be postponed.
Juan Monaco will face Spain’s Pablo Andujar in the final of the Swiss Open in Gstaad on Sunday.