Martín Miguel Vassallo Argüello[a] (born 10 February 1980) is a retired professional male tennis player from Argentina.

[1] At the 2006 French Open, he reached the fourth round of a Grand Slam event for the first time in his career.

He entered the tournament as a qualifier and beat Paul Goldstein of the United States in the first round in straight sets, No.

In late 2007, at the Orange Prokom Open in Sopot, Poland, Argüello was embroiled in a betting scandal after his match against world number four Nikolay Davydenko.

[3] In 2009, Vassallo made his Davis Cup debut for Argentina in the 5-0 defeat against The Netherlands in Buenos Aires playing doubles with Lucas Arnold Ker and in the reverse singles.