Which player remained champion in squash for 5 years?

Which player remained champion in squash for 5 years?

کون سا کھلاڑی 5 سال تک اسکواش میں چیمپئن رہا؟
Explanation

Pakistani squash player Jahangir Khan became a legend in his sport by going undefeated for five years.

He won world open title six times.

He also won 555 matches.