Dominic Thiem on John Isner's serve: Like goalkeeper facing penalty

Austrian Dominic Thiem acknowledged the great serve of John Isner after their clash at the Madrid Masters.Thiem, seeded at No. 3, recovered from a set down to beat Isner 3-6 6-3 6-4 in the Madrid Masters quarterfinal. “I think it's comparable to a goalkeeper [facing] a penalty. If he places it well, if it has the right speed, there's just no time to react," Thiem said of Isner's serve. “You either have to guess or hope that he's missing the first serve. It's just pure luck