Gabriel Diallo and Billy Harris will square off in the 1^st round of the cinch Championships for the 2^nd time in their career. They are scheduled to play on Tuesday at 7:30 pm on COURT 1. In this post, we analyze their head to head performance and prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Gabriel Diallo who should win in 2 sets.

As per the initial odds, Gabriel Diallo is the pick to win this match.
Gabriel Diallo -> 1.39
Billy Harris -> 3

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Prediction and head to head Gabriel Diallo vs. Billy Harris

This will be the 2^nd time that Gabriel Diallo and Billy Harris play each other. The head to head is 1-0 for Harris (see full H2H stats), 1-0 on grass.

The last time that they squared off, Harris won 7-6(4) 7-5 in the 1^st round in Newport back in 2024.

Gabriel Diallo

Ranked no. 44 (career-high), Diallo will start his run in London after he won the title in S Hertogenbosch after beating 7-5 7-6(8) Bergs in the final.

The Canadian has an overall 24-16 win-loss record in 2025, 5-0 on grass (See FULL STATS).

His best result of the season was winning the title in Hertogenbosch where he beat Zizou Bergs in the final 7-5 7-6(8).

Gabriel won his last 5 matches.

Talking about his overall career, Diallo has an overall 157-92 record. He has a positive 13-9 record on grass.

Previously in London

The Canadian has never competed in this tournament before.

Billy Harris

Ranked no. 113, the Brit will start his run in London after he played his last match in the Ilkley Challenger where he lost 7-6(4) 4-6 6-3 to Pinnington in the 2^nd round on the 12^th of June.

Billy has an overall 20-25 win-loss record in 2025, 1-2 on grass (See FULL STATS).

The Brit’s best result of the season was getting to the final in the New Delhi Challenger.

In terms of his career, Billy has an overall 409-269 record. He has a positive 30-19 record on grass.

Previously in London

Previously, his best result was reaching the quarter in 2024. See his history.

Tennis Scores in London

• Daniel EvansEvans – Frances TiafoeTiafoe (7-5 6-2) – Stats, scores, rankings
• Roberto Bautista AgutBautista Agut – Nuno BorgesBorges (6-7⁶ 7-5 6-4) – Stats, scores, rankings
• Holger RuneRune – Christopher O ConnellO Connell (6-3 6-4) – Stats, scores, rankings
• Jakub MensikMensik – Cameron NorrieNorrie (7-6⁶ 1-6 6-1) – Stats, scores, rankings
• Marcelo Arevalo/Mate PavicArevalo/Mate Pavic – Reilly Opelka/Ben SheltonOpelka/Ben Shelton (7-6⁵ 7-6¹) – Stats, scores, rankings

Upcoming matches in the draw

• Roberto Bautista AgutBautista Agut – (0-1) – H2H and prediction
• Mackenzie McdonaldMcdonald – Gael MonfilsMonfils (0-0) – H2H and prediction
• Jordan ThompsonThompson – Jaume Antoni Munar ClarAntoni Munar Clar (1-1) – H2H and prediction
• Reilly OpelkaOpelka – Camilo Ugo CarabelliUgo Carabelli (0-0) – H2H and prediction
• Arthur RinderknechRinderknech – (0-0) – H2H and prediction
• Alexei PopyrinPopyrin – Aleksandar VukicVukic (0-0) – H2H and prediction
• Corentin MoutetMoutet – Taylor Harry FritzHarry Fritz (0-0) – H2H and prediction
• Alex De MinaurDe Minaur – Jiri LeheckaLehecka (1-0) – H2H and prediction
• Jenson BrooksbyBrooksby – Jack DraperDraper (0-3) – H2H and prediction
• Brandon NakashimaNakashima – (0-0) – H2H and prediction
• Carlos Alcaraz GarfiaAlcaraz Garfia – Alejandro Davidovich FokinaDavidovich Fokina (2-0) – H2H and prediction
• Jacob FearnleyFearnley – Alex BoltBolt (0-0) – H2H and prediction
• Gabriel DialloDiallo – Billy HarrisHarris (0-1) – H2H and prediction