Nikoloz Basilashvili beat Jan-Lennard Struff on Sunday for the Munich trophy.

Wesley Koolhof and Kevin Krawietz celebrate capturing the Munich doubles title on Sunday.

Nikoloz Basilashvili celebrates beating Jan-Lennard Struff on Sunday in the Munich final.

Belgians Sander Gille and Joran Vliegen kept their nerves to win the first set of the Munich doubles final on Sunday.

Nikoloz Basilashvili broke Jan-Lennard Struff in the first game of the Munich final on Sunday.

Nikoloz Basilashvili broke Jan-Lennard Struff in the first game of the Munich final on Sunday.

Seventh seed Jan-Lennard Struff knocks out qualifier Ilya Ivashka on Saturday for a place in the Munich final.

Jan-Lennard Struff reaches his first ATP Tour final on Saturday after victory over Ilya Ivashka in Munich.

Ilya Ivashka defeats Alexander Zverev at the BMW Open to earn his first Top 10 win.

Jan-Lennard Struff is through to his second BMW Open semi-final in Munich.

Jan-Lennard Struff owns a 10-6 record at the BMW Open.

Top seed Alexander Zverev overcomes second-set resistance from Ricardas Berankis on Wednesday in Munich.

Second seed Casper Ruud beats Guido Pella on Wednesday for a place in the Munich quarter-finals.

Jan-Lennard Struff wins 81 per cent of his first-serve points to defeat Andrej Martin on Tuesday in Munich.

Yannick Hanfmann and Dominik Koepfer saves seven of the eight break points they face to advance on Monday in Munich.

John Millman owns a 3-0 ATP Head2Head record against Alexei Popyrin.

Top seeds Wesley Koolhof and Kevin Krawietz (centre) are making their team debut at the BMW Open in Munich.