Ollie Watkins helped Aston Villa reach the last 16 of the Champions League just hours after Arsenal had a bid turned down for the England striker, while Celtic progress to the knockout rounds for the first time since 2013.
Morgan Rogers had the Premier League side 2-0 up inside the opening five minutes as they looked set to race to victory against the Hoops, who had already secured a play-off place.
But Adam Idah, leading the line following Kyogo Furuhashi's departure, pulled the visitors level before the break in an enthralling match at Villa Park.
Ollie Watkins restored the hosts' lead before a calamitous penalty miss. However, Dane Murray gifted the ball to Watkins on his Celtic debut, with Rogers slamming the ball into the unguarded net and putting the result beyond doubt.
Unai Emery's team are through to the last 16, where they will play either Atalanta, Borussia Dortmund, Sporting or Club Brugge. Celtic will have to beat either Real Madrid or Bayern Munich to join them.
When are the knockout draws?
To determine who plays who in the knockout rounds, there will be two draws after the league phase.
The first draw on Friday January 31 at 11am will determine which of the two options each team will get in the knockout playoff. For example, a team finishing 13th will find out whether they are playing against the team finishing 19th or 20th.
Seeded teams (9th-16th) will have the second leg at home and those play-off round matches take place on February 11/12 and February 18/19.
Teams seeded from 1st to 8th will have to wait until Friday February 21 to find out their opponents.
That draw will then determine who they face in the round of 16 and ultimately map out their full path to the final.