The new signing seemed to have sealed the victory for Michael Laudrup's team but substitute Steven Lenhart hit back with two goals in the closing stages for the MLS team
A late double from Steven Lenhart rescued a draw for San Jose Earthquakes and denied Swansea City victory early on Wednesday morning at the Buck Shaw Stadium in California.
Michael Laudrup's team raced into a 2-0 lead courtesy of goals from Danny Graham and new signing Chico.
But, with little over 10 minutes left to play, Lenhart struck twice after arriving from the bench as a substitute to level the score.
Laudrup named a strong starting line-up for the match, including latest recruits Jonathan de Guzman and Michu in midfield in addition to defender Chico. Scott Sinclair, Joe Allen and Neil Taylor were unavailable, with all three representing Great Britain at the Olympic Games.
After Sercan Guvenisik had shot wide for the hosts, Graham forced a good save out of Earthquakes goalkeeper David Bingham, having been set free by Wayne Routledge.
Michel Vorm denied Sam Garza from distance before Graham went down in the box to no avail after beating Bingham to Luke Moore's ball behind the defence.
The former Watford striker spurned another chance before finally finding his range after 41 minutes. Earthquakes defender Ramiro Corrales dealt poorly with Ben Davies' cross from deep and Graham stole in to convert the resulting loose ball.
After the break, Guvenisik rose to meet a free kick and force a flying save from Vorm before the Swans seemed to have made the game safe around the hour mark.
Ashley Williams crossed to the back post following a short corner routine and £2 million signing Chico rose to aim a header past Bingham.
Substitute Chris Wondolowski wasted a chance to halve the deficit from Shea Salinas' cross, while Leroy Lita failed to put the game to bed for good when he shot wide after being set free by Stephen Dobbie.
However, Salinas was the architect when the Earthquakes eventully pulled one back, cutting a low cross back into the path of Lenhart, who found the target with a left-footed shot.
With Swansea's lack of fitness telling, Lenhart then proceeded to head home from Rafael Baca's cross before Wondolowski and Lita traded chances to win the match in front of over 9,000 fans in Santa Clara.