German first seed Alexander Zverev is on track to defend his crown at the Munich ATP event after swatting aside Canada's Gabriel Diallo on Thursday.
The world No 3 won 6-1, 6-2 in 73 minutes and will face Argentinian Francisco Cerundolo in the quarterfinals.
"I won and I won decisively, that's pretty good," Zverev said as he kept his bid for a record fourth Munich title alive.
The Bayern Munich fan, who was in attendance at Wednesday's dramatic Champions League quarterfinal win over Real Madrid, added: "It wasn't as exciting as yesterday in the Allianz Arena – that was an experience."
Zverev said the clash with fifth seed Cerundolo, who moved past Botic van de Zandschulp 6-3, 6-0 earlier in the day, "would be a more exciting match".
The 28-year-old had struggled past Serb Miomir Kecmanovic in three sets in his opener but had no such difficulties in the Munich sunshine against the world number 37 Diallo.
Diallo seemed to struggle with a back injury and needed treatment on court after the first set.
The victory was Zverev's 100th clay court win this decade, with only world No 2 Carlos Alcaraz and Dane Casper Ruud boasting more in that time.
Zverev is the only German remaining after compatriot Daniel Altmaier was defeated 6-4, 7-6 (12/10) earlier on Thursday by Slovak qualifier Alex Molcan.