Long relay is the other name for this athletics track event in which Papa M'Baye N'Diaye competed at the 1964 Summer Olympics and the 1968 Summer Olympics.
 He competed in the 4  400 metres relay at the 1964 Summer Olympics and the 1968 Summer Olympics. 
The 4400metres relay or long relay is an athletics track event in which teams consist of four runners who each complete 400metres or one lap. 
