Liverpool and Barcelona both start their campaign this evening with the likes of Real Madrid and Manchester United playing tomorrow.
But they will not kick off at the usual 7.45pm time with UEFA implementing changes to the rules.
Liverpool and Real Madrid reached last season’s final, which Los Blancos won 3-1 thanks to a Gareth Bale double.
And Liverpool star Mohamed Salah is backing his side to go one further this time around.
He said: “Of course we can make the final again.
“I am sure we can win the tournament. I think we can win both, Champions League and the Premier League.
“I don’t want to put pressure on, but everything is possible.”
What are the new kick-off times in the Champions League?
Kick-offs in the Champions League this year will replicate those in the Europa League.
In previous years, matches in Europe’s premier competition began at 7.45pm with the exception of a handful of matches played in locations such as Russia.
But this season, matches will kick-off at 5.55pm and 8pm.
Two matches will generally take place in the early slot, with the remaining six at 8pm through the group stage.
UEFA are set to review this change at the end of the 2020-21 season.
Barcelona and Tottenham are first to feature in the early kick-offs with the clubs facing PSV Eindhoven and Inter respectively at 5.55pm.
Why have the Champions League kick-off times changed?
UEFA hope that more fans will now be able to watch the matches due to different times.
It’s also hoped that the change will boost international figures resulting in increased revenue.
While the plan may work on a worldwide scale, it leaves European fans in a rush to get home for the earlier kick-off slots.
For fans in Australia and Asia, a 5.55pm kick-off time will see the match begin at 12.55am instead of 2.45am.
Those fans will be glad of getting to bed slightly earlier, at least.
Champions League fixtures
Tuesday, September 18
Barcelona v PSV (5.55pm)
Internazionale v Tottenham Hotspur (5.55pm)
Club Brugge v Borussia Dortmund (8pm)
Monaco v Atletico Madrid (8pm)
Liverpool v PSG (8pm)
Crvena Zvezda v Napoli (8pm)
Galatasaray v Lokomotiv Moskva (8pm)
Schalke 04 v Porto (8pm)
Wednesday, September 19
Shakhtar Donetsk v Hoffenheim (5.55pm)
Ajax v AEK Athens (5.55pm)
Manchester City v Olympique Lyonnais (8pm)
Real Madrid v Roma (8pm)
Viktoria Plzen v CSKA Moscow (8pm)
Young Boys v Manchester United (8pm)
Valencia v Juventus (8pm)
Benfica v Bayern Munich (8pm)
