Jannik Sinner became the first player since Roger Federer to complete the Sunshine Double when he won the Miami Open final in straight sets on Sunday.
Local hopeful Ben Shelton defeated Jiri Lehecka 6-4, 6-4 to reach the quarterfinals of the Cincinnati Open on Thursday.
Second seed Taylor Fritz battled to a three-set victory over Jiri Lehecka in the last 16 of the Canadian Open on Sunday to complete his set of ATP Masters 1000 quarter-finals.
A major power outage across Spain and Portugal has brought much of the two nations - and the Madrid Open - to a standstill.
Injury struck again at the Madrid Open as an emotional Jiri Lehecka was forced to retire in the first set of his semi-final against Felix Auger-Aliassime.
Jiri Lehecka claimed the last semifinal spot in the Madrid Open main draw after Daniil Medvedev withdrew injured at one set down on Thursday.