Floyd Mayweather has asked boxing fans to vote on whether he should fight Amir Khan next or Marcos Maidana.
Khan, 27, signed a contract in December that put him in line for a possible super-fight with Mayweather this year, but the Briton is still waiting to find out if he will face the unbeaten world light-middleweight champion.
A May showdown in Las Vegas has been mooted as a possibility, but the British fighter is not the only contender for Mayweather, with Argentinian Maidana also an option for the 36-year-old American.
And pound-for-pound world number one Mayweather has sought the opinion of fans as to which of the two he should take on, writing on his Twitter account: "I'm going to let the fans vote. Tell me who I should fight next. Khan or Maidana?"
Khan, a former world champion and 2004 Olympic silver medallist, has been holding out for a lucrative clash with Mayweather since suffering a scare in his last fight - a dramatic points victory over Julio Diaz - in Sheffield last April.
Bolton's Khan has a 28-3 record as a professional, while Mayweather has won all 45 of his bouts, including victory over the previously undefeated Ricky Hatton in 2008.
The 30-year-old Maidana, who Khan beat in 2011, has a 35-3 record.