Floyd Mayweather's much-anticipated boxing match in Dubai this weekend has been called off ... TMZ Sports has learned.
Sources tell us ... the exhibition fight -- which was supposed to pit Mayweather against his former sparring partner Don Moore on Saturday on the Burj Al Arab hotel helipad -- will no longer go down following the death of United Arab Emirates President, Sheikh Khalifa bin Zayed Al Nahyan.
Government officials, according to WAM, the official UAE news agency, have suspended "work in ministries, departments, federal and local institutions, and the private sector" for the next three days due to the Sheikh Khalifa's passing .