Djokovic advances at French Open
- Bernice Underwood
While Djokovic found himself somewhat vexed by the situation, he remained in good spirits after reaching a ninth consecutive quarter-final at Roland Garros, particularly after such a hard year due to his elbow injury.
The 20th seed maintained his ascendancy against an increasingly laboured Verdasco to secure a sixth consecutive win against the 34-year-old, who was seeking a first appearance in the quarter-finals in Paris.
The Serbian, champion at Roland Garros in 2016, wasn't broken by the Spanish veteran in a resounding 6-3 6-4 6-2 victory.
Zverev achieved a minor but what seems to be one of the most important breakthroughs of his nascent career on Sunday, June 3 as he reached his first Grand Slam quarter-final after 11 unsuccessful attempts.
"First week, my goal is to get to the second week", said Keys.
"I think that's the matchup most of the fans in Germany and Austria were hoping for when they saw the draw", he said.
"For me is awesome".
Djokovic wrapped up the second set with a rasping forehand victor after his opponent was treated for a blister on his right foot and another errant backhand putVerdasco a break down in the first game of the third.
Italian Marco Cecchinato celebrated the "best moment of his life" when he beat David Goffin to reach the French Open quarter-finals on Sunday, two years after being embroiled in a match-fixing controversy.
US Open champion Sloane Stephens cruised past Estonian Anett Kontaveit 6-0, 6-2 to book a last-eight spot for the first time.
Errors from both players made it an entertaining, if not high quality, opener as they battled it out from the baseline.
"Hopefully it will get even better". He arrived at Roland Garros with a 10-7 record this season.
Keys, the US Open runner-up to Stephens previous year, will face Kazakhstan's Yulia Putintseva for a place in the semi-finals, after the world number 98 saw off Barbora Strycova 6-4, 6-3.
"Then once you get to the second week, every match obviously has more nerves, and there's more on the line".