"I can expect that Sunday some of them will wake up in the morning and the first thing they think is Jose Mourinho, so I can imagine on Sunday I am going to be criticised for not playing Marcus but it's not my fault, he's suspended".
"So with me, in two seasons, he had 105 appearances, 5,774 mins, 63.7 matches of 90 minutes, including five finals, so the people that are speaking about these minutes, I think they are a bit confused".
"I don't think there is trust from the manager to the player that he can do it on a regular basis".
Southgate, planning for England's trip to Croatia and Spain in the Nations League, has been willing in the early weeks of the new Premier League season to abandon his usual policy of not picking players who are being left out by their club managers.
The 20-year-old has struggled for form under Jose Mourinho but he scored in the worldwide fixtures against Spain and Switzerland.
However, he has struggled to hold down a regular first-team place under Jose Mourinho at Old Trafford and will be suspended for United's next three domestic games after being sent off at Burnley before the global break.
Those performances led to questions around Rashford's playing time at United, with former Liverpool defender Jamie Carragher saying he needs to leave if he ever wants to develop into a world-class striker. They have to try to win matches.
Manchester United striker Marcus Rashford is reportedly determined to stay and fight for his place at the club despite a recent lack of first-team football. "He ended up top scorer and then got his move to Manchester United". They have to rotate their squads.
Southgate also insists the 20-year-old is further down the line in development terms than fellow striker Kane, who was farmed out on loan four times by Tottenham as a youngster before making the breakthrough at age 21. Possibly Everton is the sort of club you are looking at, just below the top six, for someone like Rashford, similar to what Lukaku did.
On Rashford's woes at club level, Southgate said: "It's not my business to interfere with club managers". "For me, I was delighted because we really wanted to make him feel important over this period anyway".
"We have to remember that Harry Kane at that age had hardly played anywhere near the matches for Spurs", he added, emphasising that Rashford is yet to reach his full potential and will continue to improve.
"His confidence will be boosted I'm sure, with two goals against top-quality opposition".