United won the Europa League in their last final but have lost all four semi-finals in which they have featured during Solskjaer's reign, including in this competition lastseason.
Real Madrid won 3-2 over Almeria last time out, while Las Palmas are impressing this season and come into this one off the back of a 2-0 win over Rayo Vallecano.
Atletico finished fourth lastseason in a group with Porto, Bayer Leverkusen and Club Brugge, missing out on the Europa League as well. Before that, it had failed to advance past the Champions League group stage only once in nine seasons.
Erling Haaland brushed off injury concerns to secure Manchester City's place in the Champions League last 16 as he scored twice in a 3-0 win over Young Boys at the Etihad.
Chelsea managed to finish their US tour on a high with a 3-1 win over AC Milan, with N'Golo Kante making his debut and Diego Costa coming back from injury - but they still look some way short of form with the new season less than two weeks away
The result ended a poor start to theseason for Chelsea, who have raised as many talking points off the field as on it following controversy surrounding the treatment of their medical staff and Terry's half-time substitution in the3-0 loss
Jarell Quansah saw a dramatic stoppage-time equaliser controversially disallowed by VAR as Liverpool suffered their first Europa League defeat of theseason in a 3-2 loss at Toulouse.
The Gunners have won seven games in a row in all competitions - scoring 23 goals - and are undefeated in 11 matches. Their last defeat was at home to Liverpool on the opening day of the Premier League season.
Rice, who captained West Ham to Europa Conference League glory lastseason and made a club-record £105m switch to Arsenal in the summer, was watching from the subs' bench as Ben White headed into his own net and Mohammed Kudus added a super
They could be his first and last birthdays at the club though, with the France captain out of contract at the end of theseason - but even if he leaves, PSG will still have a Mbappe.
With fit-again Michael Olise subbed on in the second half for his first appearance of theseason and Eze electric, the momentum seemed to be firmly with the home side.