Beşiktaş beat Mersin Idman Yurdu 2-1 in Ankara to remain in second place on 41 points.
Demba Ba has scored with both feet and his head this season but his 65th minute winner came as a result of rebound off his backside.
Ba caused Mersin trouble from aerial balls and the opposition struggled to cope with his forward runs.
The Senegalese international was awarded Man of the Match by Whoscored and given an 8.00 rating.
The 29-year-old has been in prolific form since joining on a £5.2 million move from Chelsea in the summer.
Ba has 19 goals and two assists in 25 appearances for the Black Eagles in all competitions so far this season.
The powerful forward has 10 Süper Lig goals this season, making him the fifth highest goal scorer in the league behind Burak Yılmaz, Fernandao and Gekas who have 11.
Trabzonspor striker Oscar Cardozo leads the goal scoring table with 12 league goals.