Having finished second in the Premier League last season, Tottenham have had a relatively quiet transfer window.
Yet, despite numerous reports over the past 12 months reporting that Martial and Mourinho were not seeing eye-to-eye, the former Monaco youngster is not for sale, it appears, with Tottenham failing with a bid for the forward.
Given his precarious position within the United starting team along with his obvious talent, Martial - the most expensive teenager in world football - has been subject to a bid by a rival Premier League club.Tottenham. Still just 21, he didn't feature as regularly under Jose Mourinho last season - often appearing on the left wing following the arrival of Zlatan Ibrahimovic.
Although Mourinho has insisted on numerous occasions that he intends to keep the French global at Old Trafford, it hasn't stopped some reports this summer that he could be set to leave.
Manchester United turned down both approaches, considering him off the market.
The ambitious move by the north London club may be a response to United's efforts to sign Spurs full-back Danny Rose, who went public with his discontent with his current employers in an explosive newspaper interview earlier this week.