Needing four points from their final two games of the season, Milan stand on the brink of a first Serie A title since 2011.
Villarreal became the last team to reach the Champions League knockout stages.
The pressure was on Solskjaer after Saturday's 4-2 Premier League defeat at Leicester City.
This goal allowed Salah to share the record of Liverpool’s top scorer in the UEFA Champions League with the club legend, Steven Gerrad.
Gasperini was left with a mixture of regret and pride in his team after two late goals by Paris Saint Germain ended the Italian club’s Champions League dream.
Paris St Germain scored two late goals, including a stoppage-time winner from substitute Eric Choupo-Moting, to beat outsiders Atalanta 2-1.
Second-placed Atalanta moved up to 75 points with two games left to play.
Ilicic profited from some dozy defending to tap in the opener for the visitors during the first half, but Mandzukic equalised with 10 minutes remaining.
Borrussia Dortmund striker Michy Batshuayi said he was racially abused by Atalanta fans during the second leg of their Europa League last-32 tie on Thursday.
Everton's shambolic season hit a new low at Goodison Park on Thursday with a humiliating 5-1 loss to Italian club Atalanta in the Europa League.
Seven-times European champions Milan will make their continental return away to Universitatea Craiova in the Europa League qualifiers.
Slovenia midfielder Josip Ilicic has made a permanent move to Atalanta from Serie A rivals Fiorentina, the Bergamo-based club.