Reports emanating from France have suggested that Martial wants to leave Old Trafford because his opportunities to play have been significantly reduced since the arrival of Alexis Sanchez from Arsenal in January.
"The same questions you are doing to me, you should do to every other manager because everyone has players in the same situation".
I decide that way [to use Rashford from the bench].
"But we always want more and we always want to show progression individually and as a team, so the numbers don't really matter as much as the results do to me".More news: UN Chief Warns Further Escalation After US, UK, France Airstrikes on Syria
However, Mourinho says the pair are part of a squad rotation system at the Theatre of Dreams and say he can't guarantee playing time to either player.
"If I was you I would go why [Romelu] Lukaku plays every match, why [Nemanja] Matic plays every match", Mourinho told reporters.
Nevertheless, no player has made more appearances for United than Rashford's 98 since Mourinho took over at the start of last season- a fact a stoney-faced Mourinho was quick to point out when questioned about the England international's infrequent starting opportunities.
He said: "If I have more competition for Lukaku, I have more competition for the other ones you are saying are not happy because they are not playing".
And while it seems he would like to be involved and play as many minutes as possible, the 20-year-old is first and foremost a team player.
"So probably I would have to reduce and send some away".
"After three important points we have to try to get these three and move closer to the end of the season and second position".