Gael Monfils fell victim to his second German outsider in as many weeks as the Frenchman crashed out 6-4, 6-3 in the first round at the Hamburg European Open on Tuesday.
The loss in 74 minutes to world No. 103 Yannick Hanfman handed the local wildcard his first career victory over a Top 10 opponent.
The upset came five days after Monfils went down in similar straight sets to Rome qualifier Dominik Koepfer, another German.
Monfils now heads to the French Open without a clay win in the brief run-up to the major where he reached the semi-finals a dozen years ago.
Hanfman, who played the Kitzbuehel final last month as tennis returned after the five-month COVID shutdown, secured his trip to the second round on the clay with a volley winner to the open court which third seed Monfils could barely reach.
The German finished with 20 winners and just eight unforced errors; he next takes on Chile Christian Garin, who beat former US Open finalist Kei Nishikori 6-0, 6-3.
Elsewhere at the crowd-limited event, Spanish fourth seed Roberto Bautista Agut, a new father this month, knocked out two-time champion and holder Nikoloz Basilashvili 6-4, 6-3.
The Georgian had won his last 10 main draw matches here but has yet to claim a win since Tour tennis resumed in August, standing 0-5 and losing all 11 sts he has played so far.
Bautista Agut clocked his 15th win in 20 matches and admitted he had some sleepless nights at home with his new son.
“It was very tiring last week,” the winner said. “I’m very proud of my family and very happy to have a new baby in our lives.”
Bautista Agut, seeded fourth, next plays Koepfer for the quarter-finals.
Philip Kohlschreigner, twice a home semi-finalist, was unable to hold off 2013 champion Fabio Fognini as the sixth seed scored a 4-6, 6-1, 7-5 victory.
The win in just over two and a quarter hours was his first since undergoing double ankle surgery earlier in the year
The Italian needed two chances to serve for victory, finishing with 42 winners and 38 unforced errors.