Alexander Zverev booked his place in the quarter-finals of the Halle Open with a straight-sets win over Yannick Hanfmann.

The French Open winner prevailed 6-3 7-6 (7-4) in the all-German affair in front of their home crowd, and will face either Raphael Collignon or Mattia Bellucci in the last eight.

There was not much to split the pair in the opening set, though Zverev managed to find a breakthrough in the eighth game, converting the only break point of the first.

Zverev looked to build on his momentum in the second, but missed a break point opportunity in the third game as Hanfmann looked to mount a comeback.

There were six holds to love in the second set as neither player gave anything away on serve, forcing a tie-break to settle the matter.

And much like the match, the tie-break was also a tight call, with Zverev taking only one of Hanfmann's service points to secure victory.

Zverev sets new ATP 500 record

After matching Rafael Nadal's record for the most ATP 500 wins with his first-round win over Vit Kopriva, Zverev now holds the outright record in the series.

The German has won 122 matches since the series' introduction in 2009, and will no doubt enjoy setting the record on home soil.

The 29-year-old has also extended his winning run to nine matches and will feel invincible after his maiden grand slam win earlier this month.

However, winning the Halle Open will be no easy task, with the top five seeds in Felix Auger-Aliassime, Ben Shelton, Daniil Medvedev and Taylor Fritz all still in the tournament.