Thiem rallies from a set down to defeat John Isner to set up a semifinal match against Alexander Zverev in Madrid Open.
The German overcomes a slow start to beat the Spaniard in straight sets to setup a semifinal clash against Dominic Thiem in Madrid Open.
Both Isner and Garin needed three sets to enter the quarterfinals of the Madrid Open.
The serve in the game of tennis is one of the most important aspects and a fast, accurate serve is a great asset to a player.