20 year old American Coco Vandeweghe was beaten in the first round of the WTA Whirlpool Monterrey Open on Monday.

Vandeweghe battled hard but lost to top seed Roberta Vinci 7-5, 7-5. Second seed Italian Sara Errani also won beating Canadian Stephanie Dubois.

Former world no. 4 Jelena Dokic continued to struggle, going down to Alexandra Cadantu  36 61 75.

Serena Williams pulled out of the event earlier on Sunday but was at the site for some promotional activities along with Gisela Dulko.

WHIRLPOOL MONTERREY OPEN
Monterrey, México

Monday, February 20, 2012 - Singles - First Round
(1) Roberta Vinci (ITA) d. Coco Vandeweghe (USA) 75 75
(2) Sara Errani (ITA) d. Stéphanie Dubois (CAN) 62 62
Nina Bratchikova (RUS) d. Anastasia Pivovarova (RUS) 63 61
Alexandra Cadantu (ROU) d. Jelena Dokic (AUS) 36 61 75

Singles Qualifying - Final Round
(1) Sesil Karatantcheva (KAZ) d. Romana Tabak (SVK) 62 61
(5) Monica Puig (PUR) d. Amra Sadikovic (SUI) 76(6) 62
Maria Abramovic (CRO) d. Maria Joao Koehler (POR) 57 63 64
Katalin Marosi (HUN) d. Sun Sheng-Nan (CHN) 76(3) 64