Canadian Gabriel Diallo is the top-ranked Canuck to compete in this first week of the clay-court season.

And he’s in Bucharest, Romania, with a first-rounder against Chun-Hsin Tseng of Taipei.

In Houston, Kei Nishikori’s comeback continues as he’s seeded (at No. 8) for the first time in a long, long time in a tournament. And he got through his first one comfortably.

(Houston is one hour behind EDT, Marrakech is four hours ahead, and Bucharest is seven hours ahead)

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Fayez Sarofim & Co. U.S. Men’s Clay Court Championship
Location: Houston, Texas
Category: ATP 250
Surface: Outdoor Clay
Dates: March 31 – April 6, 2025
Prize Money: $680,140
Draws: S28 – D16

Tuesday, April 1, 2025
Final results

Singles, first round

[WC] Ethan Quinn (USA) def [6] Jordan Thompson (AUS) 46 64 63

[8] Kei Nishikori (JPN) def. [Q] Mitchell Krueger (USA) 64 62

Christopher Eubanks (USA) def. Rinky Hijikata (AUS) 62 46 63

~~Nicolas Moreno De Alboran (USA)~~ [LL] Adrian Mannarino (FRA) def Yannick Hanfmann (GER) 76 (5) 63

Mackenzie McDonald (USA) def. Daniel Elahi Galan (COL) 62 67 (3) 64

[Q] Colton Smith (USA) def James Duckworth (AUS) 62 62

Adam Walton (AUS) def. [WC] Michael Mmoh (USA) 63 76 (5)

Doubles, first round

Ryan Seggerman / Patrik Trhac (USA) def [2] Christian Harrison / Evan King (USA) 62 16 [14-12]

Matthew Romios / Adam Walton (AUS) def Mackenzie McDonald / Alex Michelsen (USA) 76 (5) 46 [10-8]

Federico Agustin Gomez (ARG) / Santiago Gonzalez (MEX) def N Sriram Balaji (IND) / Miguel Angel Reyes Varela (MEX) 76 (3) 63

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Tiriac Open
Location: Bucharest, Romania
Category: ATP 250
Surface: Outdoor Clay
Dates: March 31 – April 6, 2025
Prize Money: €596,035
Draws: S28 – D16

Tuesday, April 1, 2025
Final results

Singles, first round

Gabriel Diallo (CAN) def. Chun-Tsin Tseng (TPE) 76 (5) 76(2)

[5] Roberto Bautista Agut (ESP) def. Yunchaokete Bu (CHN) 36 62 75

[8] Camilo Ugo Carabelli (ARG) def. Radu Albot (MDA) 64 63

Francisco Comesana (ARG) def [Q] Martin Klizan (SVK) 46 75 75

Damir Dzumhur (BIH) def. [Q] Valentin Vacherot (MON) 62 61

Marton Fucsovics (HUN) def. Luca Nardi (ITA) 63 61

[Q] Filip Misolic (AUT) def Alexander Shevchenko (KAZ) 63 64

Christopher O’Connell (AUS) def. Dusan Lajovic (SRB) 64 63

[WC] Stan Wawrinka (SUI) def [Q] Timofey Skatov (KAZ) 64 67 (5) 76 (1)

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Grand Prix Hassan II
Location: Marrakech, Morocco
Category: ATP 250
Surface: Outdoor Clay
Dates: March 31 – April 6, 2025
Prize Money: €596,035
Draws: S28 – D16

Tuesday, April 1, 2025
Final results

Singles, first round

[Q] Kamil Majchrzak (POL) def [6] Jaume Munar (ESP) 64 63

[8] Mattia Bellucci (ITA) def. Pavel Kotov (RUS) 64 64

Pablo Carreno Busta (ESP) def. [WC] Younes Lalami Laaroussi (MAR) 61 63

Jesper de Jong (NED) def. [WC] Elliot Benchetrit (MAR) 75 61

Hugo Gaston (FRA) def. [Q] Juan Manuel Cerundolo (ARG) 57 63 64

[Q] Pierre-Hugues Herbert (FRA) def [Q] Federico Coria (ARG) 46 63 62

Otto Virtanen (FIN) def Daniel Altmaier (GER) 62 46 76 (3)

Doubles, first round

[1] Hugo Nys (MON) / Edouard Roger-Vasselin (FRA) def. Guido Andreozzi (ARG) / Théo Arribage (FRA) 67 (5) 62 [10-6]

[2] Ariel Behar (URU) / Joran Vliegen (BEL) def ~~Luciano Darderi / Fabio Fognini (ITA)~~ [ALT] Tristan Boyer (USA) / Otto Virtanen (FIN) 64 64

Jakub Paul (SUI) / David Pel (NED) def Francisco Cabral (POR) / Lucas Miedler (AUT) 76 (4) 16 [10-6]

Romain Arneodo (MON) / Manuel Guinard (FRA) def Sander Arends (NED) / Luke Johnson (GBR) 75 76 (4)