In just a little over one week, 18-year-old Deiton Baughman has played one of the best junior tennis players in the world, and also one of last year’s best in college tennis.

The Carson resident, who signed a pro contract with IMG back in April, on Wednesday beat NCAA runner-up Alex Sarkissian formerly of Pepperdine, 6-3, 6-3, in the first round of the 19^th annual Claremont Club Pro Classic to advance to the second round.

Baughman was coming off a close first-round loss last week to US Open Junior Tournament boys’ singles and doubles champion Omar Jasika of Australia, 7-6 (5), 7-5, a few points against him here and there being the difference in the match.

A 17-year-old from Melbourne, Jasika became the first player in 28 years to lift both the boys’ singles and doubles trophies at the US Open and joined fellow Australian’s Pat Cash (1982) and Bernard Tomic (2009) as past winners of the US Open junior tournament.

Four players who worked their way through three round of qualifying to make the main draw advanced on to the second round on Wednesday, including American’s Eric Johnson, Ty Trombetta, Frederick Saba and the Netherland’s Max DeVroome.

Recently turned 17-year-old Reilly Opelka of Florida took advantage of his “lucky loser” spot in the draw after USTA wild card Collin Altamirano pulled out of the singles due to injury. Opelka fell to Trombetta in three sets in the qualifying singles but used his second life to beat another qualifier and fellow 17-year-old Logan Smith of Carlsbad, 2-6, 6-3, 6-1.

Baughman and Opelka are teamed up in doubles this week and moved into the second round when Altamirano was forced to withdraw from the doubles with partner Tommy Paul.

Wednesday’s First-Round Singles Results:

q: Qualifying; wc: Wild Card; LL: Lucky Loser

Deiton Baughman (USA) def. Alex Sarkissian (USA), 6-3, 6-3

Eric Johnson (USA) [q] def. Eduardo Nava (USA) [wc], 7-6 (8), 7-5

Reilly Opelka (USA) [LL] def. Logan Smith (USA) [q], 2-6, 6-3, 6-1

Greg Ouelette (USA) def. Andre Dome (USA) [q], 7-6 (3), 7-6 (3)

Salvatore Caruso (ITA) [4] def. Ryan Storrie (GBR) [q], 6-0, 6-1

Ty Trombetta (USA) [q] def. Haythem Abid (TUN), 6-2, 6-4

Max DeVroome (NED) [q] def. Evan Song (USA), 5-7, 6-3, 6-3

Roberto Quiroz (ECU) def. Gary Sacks (RSA), 6-3, 6-1

Frederick Saba (USA) [q] def. Stefan Menichella (USA) [wc], 7-6 (5), 6-3

Sebastian Rivera (ECU) def. Connor Farren (USA), 6-2, 3-6, 6-3

Mico Santiago (USA) def. David Hsu (USA) [q], 6-3, 6-2

Wednesday’s Second-Round Doubles Results:

Mackenzie McDonald (USA) / Martin Redlicki (USA) [1] def. Christopher Helliar (GBR) / Daniel Manlow (GBR), 6-7 (1), 6-4, 10-5

Andre Dome (USA) [4] / Fabian Matthews (USA) def. Randy Blanco (CUB) / Yuanfeng Li (CHN), 4-6, 0-6, 10-3

Jeff Dadamo (USA) / Dennis Nevolo (USA) [wc] def. Daniel Garza (MEX) / Eduardo Nava (USA) [3], 6-1, 6-3

Deiton Baughman (USA) / Reilly Opelka (USA) def. Collin Altamirano (USA) / Tommy Paul (USA), walkover

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—Steve Pratt