Despite playing second fiddle to De Gea this term, Romero is expected to start the Europa League final against Ajax on Wednesday (7.45pm).
"We played a good team, a team who tried to win and tried to finish well".
The result had no material impact on United's season, given they were already guaranteed to finish sixth, and means Mourinho's men have now drawn 15 times this season.
"Whoever plays in the final is good enough to go out there and win the game".
"I think all of them gave me positive feelings".
Speaking ahead of the Saints' goalless draw with Manchester United on Wednesday night, chairman Ralph Krueger said that a decision over the 55-year-old's position at St Mary's Stadium can wait until next week. When you look at Jose's fixture list, this will be his 63rd game. I have been here seven years and I never saw any detail trying to care about the English teams involved in European competitions.More news: Iran sanctions 9 American firms as countermeasure
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He also reiterated his optimism De Gea would remain at the club, having earlier confirmed he would not play again this season, and amid increasing speculation linking the Spaniard with a transfer to Real Madrid.
"I never saw that with Chelsea, I never saw that with Manchester United, I never saw that with Manchester City previous year".
"I will bring in (Demitri) Mitchell, (Scott) McTominay, of course Axel (Tuanzebe), of course Eric Bailly, (Matty) Willock will come too, Josh Harrop will come, Zachary (Dearnley) will come", the 54-year-old said.
Mourinho said his side's league outing should have been moved to Saturday as he asked for Palace manager Sam Allardyce to take it easy against what is set to be a youthful United team.
Mourinho also revealed the strategy for the upcoming home game.
Puel is only concerned about preparing his side for the visit of Stoke City on the final day, though, on the back of what he believes was a good showing in the stalemate with United.