Sumit Nagal takes one set before going down Stan Wawrinka in Prague Open
Earlier, Sumit Nagal advanced to the singles quarterfinals of the Prague Open with a hard-fought victory over lower-ranked Kiri Lehecka.
Earlier, Sumit Nagal advanced to the singles quarterfinals of the Prague Open with a hard-fought victory over lower-ranked Kiri Lehecka.
The Scot's limp was noticeable at times as he fell 7-5 2-6 6-4 6-4 to Spain's Fernando Verdasco, whose only win over Murray in 14 prior meetings was at the 2009 Australian Open.
Wawrinka, who lost to Rafael Nadal in last year's final and won the 2015 title, was beaten in a five-set thriller.
"I expected a tough match," world number 15 Wawrinka told atpworldtour.com on Thursday. "He's already played a few matches here."
A four-set victory over Novak Djokovic in the 2016 final gave Wawrinka his third major crown.
Wawrinka will face American Sam Querrey in the quarter-finals.
Roger Federer, Rafael Nadal and Kei Nishikori advanced to the quarter-finals on cue.
Recent wins have propelled the Swiss master to sixth in the world after a six-month injury layoff.
At 35, Federer is the oldest ATP player to win one of the elite Masters titles.
Wawrinka didn't face a break point himself as he advanced to a meeting with Yoshihito Nishioka.
