Matteo Arnaldi vs Quentin Halys: AI Prediction | Games, Spread, Aces & Double Faults

The model’s edge is driven most strongly by contrasting factors: the serve & return dynamic favors Halys (+6.1 points), while Arnaldi’s superior overall strength (+5.1), recent results (+4.8), age (+2.6) and surface fit (+2.4) swing the balance back to him. Halys brings a marginally stronger mean serve index (96.47 vs 95.56), which — combined with grass being the fastest surface — underpins his serve & return advantage. Arnaldi, however, boasts a markedly better mean return index (92.60 vs 82.57), a gap of roughly 10 points that explains much of his ability to neutralize big servers and win more return games. Looking at the numbers: Arnaldi is the higher-ranked player (No. 35) with an Elo around 1784 and a healthy form index (~62.1); his surface strength index on grass (7.84) is also superior to Halys’s (4.24). Halys sits around rank 95 with an Elo near 1631 and a lower form index (~37.6). Both arrive without tournament fatigue. Over their last three grass matches at Eastbourne, Arnaldi won two and then lost his most recent match; Halys has one win bookended by two losses. Those recent patterns help explain the model leaning slightly toward Arnaldi despite Halys’s serving tools.