Despite this , he fell in the first round to qualifier Mischa Zverev .
Thiem started his grass court campaign at the 2015 MercedesCup , where he entered as the seventh seed .
Despite this , Thiem fell in the first round to qualifier Mischa Zverev .
Thiem started his grass court campaign at the 2015 MercedesCup , where he entered as the seventh seed .