Ole Gunnar Solskjaer urged his Manchester United stars to seize a “fantastic opportunity” to qualify for the Champions League after Mason Greenwood rescued a 1-1 draw against West Ham on Wednesday.
Solskjaer’s side fell behind to Michail Antonio’s penalty in the first half at Old Trafford.
But teenage forward Greenwood struck after the interval to lift United into third place in the Premier League.
They are ahead of fourth-placed Chelsea on goal difference after the Blues lost 5-3 later at champions Liverpool.
United will finish in the top four if they draw or win in their decisive showdown with fifth-placed Leicester on Sunday.
They are one point ahead of Leicester going into their last game of the season at the King Power Stadium.
Solskjaer’s team were well below their best against West Ham, but they are now unbeaten in 13 league matches and will complete an impressive surge into the Champions League if they emerge unscathed at Leicester.
They can also qualify for Europe’s elite club competition if they win the Europa League in August.
West Ham’s point ensured they are mathematically certain to avoid relegation.