Complex sentence: Having lost early, Harrison competed in the BMW Tennis Championship where he lost first round, and then after receiving another wildcard into the 2010 Sony Ericsson Open lost in the first round to Michaël Llodra.
Split into simpler sentences: Having lost early, Harrison competed in the BMW Tennis Championship, where he lost in the first round. After receiving another wildcard into the 2010 Sony Ericsson Open, he lost in the first round to Michaël Llodra.