Roberto Bautisuta Agut in action at the Bett1 Aces in Berlin.
Image credit: Getty Images
The Spaniard won 6-3 3-6 10-7 in the opening match of the tournament at the Steffi Graff Stadium.
The Bett1 Aces is a grass exhibition event featuring ATP and WTA players and played in front of a limited number of fans.
Highlights: Roberto Bautista Agut beats Jan-Lennard Struff in Berlin
After dropping serve in the opening game, Bautista Agut battled back to take the first set against Struff.
The German took the second set with a break in the sixth game, but Bautista Agut edged the match tiebreak to win the contest.
'Brilliant' - Roberto Bautista Agut produces sublime winner in Berlin
Julia Goerges retired from her match against Anastasija Sevastova due to injury, trailing 6-4 4-3.
Former world No 2 Tommy Haas plays Jannik Sinner on Monday while Petra Kvitova faces Andrea Petkovic from around 5pm.
Stage 2, Vienne - Col de Porte (181km)
Semi-finals, Day 14