Ehud "Udi" Vaks (Hebrew: אהוד "אודי" וקס; born 27 June 1979) is an Israeli judoka.

[1] In the 2004 Summer Olympics, competing in the half lightweight (66 kg) weight class, Vaks was scheduled to fight Iranian competitor Arash Miresmaeili in the first round.

[2] It is widely believed that Miresmaili deliberately set out to be disqualified for political reasons, which is supported by his own comments: “Although I have trained for months and was in good shape I refused to fight my Israeli opponent to sympathise with the suffering of the people of Palestine and I do not feel upset at all.

"[5] Iranian Olympic team chairman Nassrollah Sajadi told the Sharq newspaper that the government should give the athlete a $115,000 bonus for his actions, the same amount it gave to gold medalists.

[6] Miresmaeili's disqualification resulted in Vaks being awarded a bye into the 2nd round, where he was defeated by Algerian judoka Amar Meridja.