Daniel Altmaier defeated Taylor Fritz 7–5, 3–6, 6–3, 6–1 in the first round of Roland Garros on clay on 26 May 2025, pulling off a notable upset against the pre-match favourite. Fritz, quoted at 1.32 odds, entered as the stronger betting proposition, but Altmaier's clay-court credentials proved decisive in a performance that saw the German secure the opening set in a tight tiebreaker-free affair before Fritz levelled through the second. The momentum shifted decisively thereafter, with Altmaier controlling the third and fourth sets to advance comfortably. This result represents a significant statement from Altmaier on the Roland Garros clay and suggests Fritz may face a challenging fortnight in Paris.