It's back to pre-season action after the first Champions League game of the season as West Ham visit Celtic Park.
Celtic are likely to play a mixed team with the second leg taking place on Wednesday and Ange Postecoglou will want to protect his big players.
He will still want to get minutes in the legs of the likes of Odsonne Edouard and Tom Rogic who have been injured during pre-season.
There's set to be 18,000 fans inside Celtic Park for the biggest crowd in Scottish football since March 2020 and that should fire things up for this friendly.
Here's everything you need to know about the friendly.
When is kick-off?
Celtic take on West Ham as they continue their preparations for the campaign. Kick-off at Celtic Park is at 3pm.
Is it on TV?
Yes. The game is being shown live on Premier Sports and the programme begins at 2.30pm.
Can it be live streamed?
Yes. Premier Sports subscribers can watch the game on their app and Celtic season ticket holders can view it on the 'pass to paradise'.
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