The last stage of the Champions League qualifying marathon kicks off on Tuesday with three clubs who have already got their hands on the trophy eager to grab one of the last six group slots and the cheque that goes with it.
Benfica, who won the European Cup in 1961 and 1962 and have reached the final five times since then, face Dynamo Kyiv.
While Benfica coach Roger Schmidt worries whether Alex Grimaldo will recover from the dizzy spell that forced him off in Saturday's 1-0 league win at Casa Pia, the Ukrainians made clear they have weightier concerns.
The game will be in Lodz, where Dynamo are in exile following Russia's invasion of Ukraine.
The two clubs met in the group stage last season.
They drew 0-0 in Kyiv in the opening round, Dynamo's only point. The Portuguese side won 2-0 at home in the last round to edge Barcelona for second in the group.
Returning to the group stage this year offers a hefty reward.
Each club is guaranteed 15.64 million euros ($16.04 million) for taking part. They can also collect 2.8m euros for every group stage victory and 930,000 euros for a draw. Teams that miss out, drop to the Europa League group stage where they are guaranteed 3.63m euros.
PSV Eindhoven, who needed an extra-time goal to eliminate Monaco in the previous round, face Rangers.
Ruud van Nistelrooy, who replaced Schmidt as coach at the 1988 European champions, faces old international team-mate and club adversary Giovanni van Bronckhorst, in Glasgow on Tuesday.
The two coaches were long-time Netherlands team-mates.
They played on opposite sides the last time the clubs met in the Champions League.
Rangers, with Van Bronckhorst in midfield, won home and away in the 1999 group stage. Van Nistelrooy scored PSV's goal at Ibrox as Rangers won 4-1.
The third former champions in action are 1991 winners Red Star Belgrade, who visit Macabbi Haifa on Wednesday.
The Israelis surged through the last round by scoring three times in the last 30 minutes for an eye-catching 4-0 second-leg victory at Olympiakos.