Ex-Celtic full-back Jeremie Frimpong gallops down the right and thinks he's won a corner, but the lineman signals for a goal kick.

First warning sign of the Dutchman's threat.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

Greek referee Tasos Sidiropoulos blows his whistle and we're off.

Can sense goals in this one...

Unpopular opinion: The Europa League anthem is better than the Champions League anthem...

More from Celtic manager Ange Postecoglou, who tells BT Sport that James Forrest's fitness is "in a good place" ahead of his first start since August.

"We have been slowly building him [Forrest] up," he says. "I doubt he will last the 90 but I think it will be good for him to get a start for us.

"It's good for us to have the likes of Liel Abada and Mikey Johnston on the bench - we are going to need some legs at the end of the game for sure, having them available is good."

Image source, BBC Sport

Bayer Leverkusen: Hradecky, Frimpong, Kossounou, Tah, Hincapie, Palacios, Andrich, Diaby, Wirtz, Paulinho, Adli.

Substitutes: Lomb, Lunev, Retsos, Amiri, Tapsoba, Sinkgraven, Gedikli.

Image source, BBC Sport

Celtic: Hart, Ralston, Carter-Vickers, Welsh, Juranovic, Bitton, McGregor, Forrest, Turnbull, Jota, Kyogo.

Substitutes: Bain, Scales, Oluwayemi, Ajeti, Abada, Soro, McCarthy, Johnston, Urhoghide, Shaw, Murray, Montgomery.

Celtic boss Ange Postecoglou tells BT Sport: "Every week is a test, it's a different test and a different challenge.

"No doubt it's a massive one against a good side who are hitting their form in the Bundesliga and in the Europa League.

"They have been the standout team in our group so it's a great challenge for us, but we are in good form and looking forward to it."

• This is only the second meeting of the sides, with the Germans winning 4-0 on matchday two of the section.
• Celtic have lost six of their seven matches in Germany in the Uefa Cup/Europa League (D1), most recently in October 2018 against RB Leipzig.
• Bayer Leverkusen have never lost a home Europa League group stage match in 14 (W11 D3) - the most of any side without losing in the competition's history.
• No team has forced more high turnovers in the Europa League this season than Celtic (47) with 10 of those ending in a shot - the most of any team.

We'll also have radio coverage for you this evening.

You can catch Sportsound right now on BBC Radio Scotland MW, online or right here on this page.

The team will provide commentary of Celtic's trip to Leverkusen, plus updates from Ibrox.

Image source, SNS

Celtic got an absolute lesson from Leverkusen in the reverse fixture at the end of September. The Bundesliga side thrashed Ange Postecoglou's men 4-0 in Glasgow.

Since that defeat, Celtic have gone on a nine-game unbeaten - winning eight and drawing one - and Postecoglou wants to judge his players' progress tonight.

Image source, SNS

"We want to go there and not miss the opportunity to measure ourselves," he said. "We want to be playing at this level consistently.

"We want to be qualifying for these tournaments and for the knockout stages and we've got to measure ourselves against the best."

Celtic's back-to-back wins over Hungarians Ferencvaros secured European football post-Christmas, but which competition that will be in remains to be seen.

Defeat tonight in Leverkusen and victory for Real Betis would end the Scottish side's Europa League quest.

A draw keeps Ange Postecoglou's men alive in the group, while a dream victory would narrow the gap on top spot to just a point with one game remaining.

Image source, BBC Sport

Are you part of the travelling Celtic army in Leverkusen?

These fans certainly look like they are enjoying themselves...

Image source, SNS

Image source, SNS

Celtic fans, do you agree with your manager's team selection?

Let us know on those thumbs. If you would've changed anything else, don't be shy and let us know at @BBCSportScot...

James Forrest's Hampden heroics earn him a first start since August as Celtic bid to keep alive their hopes of Europa League progress.

The fit-again winger, who scored the only goal against St Johnstone to send his side into the League Cup final, is preferred to Liel Abada, who drops to the bench.

Image source, SNS

Image source, BBC/SNS/Getty

After mixed fortunes at Hampden at the weekend, it's back to Europa League action for Celtic and Rangers this evening - and what a big night we have in store.

Ange Postecoglou's side are first up and face a daunting trip to Bayer Leverkusen (17:45 GMT).

Rangers round off the night at Ibrox, as Giovanni van Bronckhorst takes charge of his first game for the visit of Sparta Prague (20:00).

We'll have all the build-up right here, plus live text commentary of both games.