Gael Monfils defeated Daniel Altmaier 7–5, 6–3, 7–6 in the first round of the Australian Open on hard court on 16 January 2025, confirming his status as the heavy pre-match favourite. Monfils controlled the match across three sets, breaking Altmaier's serve sufficiently in the opening two frames to establish commanding leads before closing out a tiebreak in the third. The Frenchman's experience and court positioning proved decisive against his German opponent, who could not generate the consistency required to trouble the favourite. Monfils advances to the second round, maintaining his Australian Open campaign with a straightforward victory.