CALABASAS, Calif., — Karue Sell registered the first big upset at the USTA Men’s Pro Tennis Championships of Calabasas when the former UCLA standout upset No. 2 seed Calvin Hemery of France 6-2, 6-4 on Wednesday afternoon at the Calabasas Tennis & Swim Center.

Sell, a qualifier from Jaragua du Sul Brazil, converted 76 percent of his first-serve points and faced just one break point en route to earning the victory in one hour and 10 minutes.

A busy Wednesday of first-round matches following Tuesday’s rain produced several thrilling matches. However No. 1 seed Mackenzie McDonald of Piedmont, Calif., had little drama in his match, dropping just three games in defeating Clay Thompson in a battle of former UCLA Bruins.

Of the remaining six seeded players only one failed to advance to the round of 16. No. 5 seed Finn Tearney of New Zealand, in a match that began Tuesday, was upset by Jan Choinski of Germany 7-5, 6-7 (4), 7-6 (4).

The Choinski-Tearney match was not the only match on Wednesday to be settled in a third-set tiebreaker. Later in the day Fred Simonsson of Sweden rallied to defeat qualifier Gage Brymer, a senior at UCLA, 2-6, 6-4, 7-6 (4).

Other seeded players to advance to the round of 16 on Wednesday included No. 3 seed Tommy Paul of Boca Raton, Fla., No. 4 seed Sebastian Fanselow of Germany and 2014 Calabasas champion and No. 6 seed Marcos Giron of Thousand Oaks, Calif.

Wednesday’s First-Round Singles Scores
wc: wild card
Daniel Nolan, USA, def. Ryan Hardin, USA, (wc) 6-0, 6-1.
Jan Choinski, GER, def. Finn Tearney (5), NZL, 7-5, 6-7 (4), 7-6 (4).
Mackenzie McDonald (1), USA def. Clay Thompson, USA 6-2, 6-1.
Marcos Giron (6), USA, def. Mousheg Hovhannisyan, USA 6-1, 6-7 (4), 6-4.
Dominik Koepfer (7), GER def. Alessandro-Damiano Ventre, BRA 6-4, 6-4.
Julian Lenz, GER def. Gonzalez Austin, USA 6-3, 3-6, 7-5.
Jared Hiltzik (8), USA def. Alejandro Tabilo, CHI 6-4, 6-2.
Fred Simonsson, SWE def. Gage Brymer, USA 2-6, 6-4, 7-6 (4).
John Lamble, USA def. Connor Smith, USA 6-2, 6-0.
Sebastian Fanselow (4), GER def. Alexios Halebian, USA 6-4, 7-5.
Bradley Klahn, USA (wc) def. Farzin Danny Amiri, USA 6-3, 6-2.
Keegan Smith, USA def. Evan Song, USA 7-6 (6), 6-2.
Karue Sell, BRA def. Calvin Hemery (2), FRA 6-2, 6-4.
Tommy Paul (3), USA def. Michael Geerts, BEL 6-2, 6-1.
Samir Iftikhar, PAK, def. Sergey Betov, BLR 6-4, 7-6 (4).

Wednesday’s First-Round Doubles Scores
Brandon Anadan, USA / Clay Thompson, USA def. Quinn Borchard, USA / Carl-Henrik Hansen, USA (wc), 6-7 (3), 6-2, 10-3.
Henry Craig, USA / Miles Seeman, USA (wc), def. Julian Bradley, IRL / Will Spencer, USA 7-5, 6-4.
Connor Smith, USA / Bradley Klahn, USA (4) def. Connor Farren, USA / Tanner Smith, USA 6-2, 6-4.

Championship weekend begins on Friday, March 24, with quarterfinal matches. Friday’s busy day begins with a Pro-am drill from 9 to 11 a.m. and later that night a Community Tennis Appreciation Night. During the Friday evening session local USTA and WTT captains and other San Fernando Valley area tennis leaders will be recognized.

There will also be a VIP/Sponsor-Partner Reception, USTA League Player Challenge and Stadium Court Junior Exhibitions on Friday, March 24.

Saturday’s events include the semifinals along with a USTA Junior Team Tennis Kid’s Tennis Carnival from10:30 a.m. to noon.