Anthony Martial may have played a crucial part to keep Jose Mourinho at Manchester United. His 76th minute equaliser against Newcastle United in the 3-2 win was coincidentally his 25th league goal at the club.This goal triggered a clause in his contract set up when he joined United in 2015. A landmark 25th league goal effectively ensured that the Red Devils would part with 8.73 million Sterling Pounds. This money is entitled to Monaco, the club from which United bought the French forward from.United surprisingly paid an initial fee of 36 million pounds to sign him from Monaco. However, it sanctioned additional payments if Martial reached certain milestones. The total cost of his transfer has shot to 44.73 million pounds in what is expected be the final figure.Martial has blown hot and cold at Old Trafford since his arrival. He was an instant hit at the club, scoring 17 goals in his first season. However, outright competition for places and a falling out with Mourinho has resulted in limited playing time.