Alexander Zverev into ATP quarter-finals

Defending champion Alexander Zverev moved into the quarter-finals of the BMW Open in Munich having come from behind to beat fellow German Yannick Hanfmann.

The top seed and world No.3 bounced back after wildcard Hanfmann - ranked 118th in the world - took the first set via a lengthy tiebreaker.

Zverev eventually posted a 6-7 (12-14) 6-4 6-2 victory and will face another compatriot in the next round in Jan-Lennard Struff, who beat another German, Yannick Maden, 6-3 3-6 6-3.

South Korea's fourth seed Hyeon Chung progressed as he also overcame a German wildcard, easing past Matthias Bachinger 6-1 6-1.

He now takes on Slovakian qualifier Martin Klizan, who won 4-6 6-3 7-5 against Bosnia's Mirza Basic.