Zverev cruises into second round at Halle, Monfils ousted

FILE PHOTO: Jun 6, 2019; Paris, France: Alexander Zverev (GER) in action during his match against Novak Djokovic (SRB) on day 12 of the 2019 French Open at Stade Roland Garros. Mandatory Credit: Susan Mullane-USA TODAY Sports

(Reuters) - World number five Alexander Zverev of Germany breezed into the second round of the Halle Open with a 6-4 7-5 victory over Dutchman Robin Hasse on Monday.

Second-seeded Zverev struggled on serve at times and finished with seven double faults but he fired 12 aces and converted four break points to advance after an hour and 45 minutes.

Russian third seed Karen Khachanov also progressed by winning 7-6(5) 6-4 against Serbia's Miomir Kecmanovic -- a late replacement for Damir Dzumhur who withdrew from the tournament.

FILE PHOTO: Jun 6, 2019; Paris, France: Karen Khachanov (RUS) in action during his match against Dominic Thiem (AUT) on day 12 of the 2019 French Open at Stade Roland Garros. Mandatory Credit: Susan Mullane-USA TODAY Sports

However, there was an early upset when fifth seed Gael Monfils lost 7-6(6) 6-4 to French compatriot Pierre-Hugues Herbert.

Top seed Roger Federer is in action on Tuesday against John Millman, who beat the Swiss at the U.S. Open last year.

FILE PHOTO: Tennis - French Open - Roland Garros, Paris, France - May 29, 2019. France's Pierre-Hugues Herbert in action during his second round match against France's Benoit Paire. REUTERS/Christian Hartmann

(Reporting by Rohith Nair in Bengaluru; Editing by Ken Ferris)

FILE PHOTO: Jun 3, 2019; Paris, France: Gael Monfils (FRA) in action during his match against Dominic Thiem (AUT) on day nine of the 2019 French Open at Stade Roland Garros. Mandatory Credit: Susan Mullane-USA TODAY Sports