Stan Wawrinka was forced into a huge battle before advancing into the Mexican Open first round on Monday.

Wawrinka, the third seed at the ATP 500 event in Acapulco, needed two hours, 45 minutes to edge Frances Tiafoe 6-3, 6-7 (4-7), 7-6 (7-1).

The Swiss three-time grand slam champion squandered four match points before battling through.

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Wawrinka was the only seed in action on Monday, as two American qualifiers – Tommy Paul and Marcos Giron – progressed.

Adrian Mannarino overcame wildcard Cameron Norrie 2-6, 6-3, 6-3, Miomir Kecmanovic edged past Alex de Minaur 3-6, 6-4, 6-3, and Kyle Edmund hammered Feliciano Lopez 6-4, 6-1.

At the Chile Open, sixth seed Hugo Dellien got through to the first round, while Roberto Carballes Baena and wildcards Thiago Seyboth Wild and Marcelo Tomas Barrios Vera also won.