LONDON - Britain's Amir Khan has declared that his observance of the Muslim festival of Ramadan would not prevent him from fighting Floyd Mayweather in September . After preserving his unbeaten record with a points victory over Manny Pacquiao in their long-awaited mega-fight last weekend, Mayweather said that his final bout will take place in Las Vegas in September . Ramadan, during which Muslims are obliged to fast, is due to end on July 17 this year and Khan believes that would give him enough time to fully prepare for an encounter with the American pound-for-pound master. "I'm not ruling out fighting in September because it's possible that it could happen," Khan told journalists during a conference call to promote his May 29 fight against Chris Algieri in New York.