Joao Fonseca defeated Zizou Bergs 6–7 6–0 6–3 in the first round of the ATP 250 Eastbourne Championships on grass on 23 June 2025, confirming his status as pre-match favourite with odds of 1.54 to Bergs' 2.64. The Portuguese player recovered from a tight opening set, which went to a tiebreak, to dominate the second and third sets and secure a commanding victory. Fonseca's ability to regain composure after a competitive first-set loss and subsequently control the match on grass underscores his growing confidence on the surface ahead of the season's grass-court swing.