Barcelona will play Bayern Munich in a massive Champions League Semi-Final First-Leg game on Wednesday night. Barcelona will be hoping to secure a first leg lead to take with them to Germany for the return leg, however, Bayern will be looking to get an away goal or two to gain the upper hand.

This semi-final game between Barcelona and Bayern Munich has a scheduled start time of 7.45 p.m. BST (2.45 p.m. ET) and takes place from the Nou Camp in Spain. The game can be watched online through live stream via the link provided below.

Bayern have reported that striker Robert Lewandowski may be able to play with the use of a protective mask for Wednesday's big game. He recently broke his nose and jaw after clashing with Borussia Dortmund goalkeeper Mitchell Langerak, but may be able to play a part for tonight's Champions League match up.

Lewandowski has said ahead of the game: "It's all OK. We'll take a look and see how it is, but I'm not afraid of anything."

Bayern will also be without Arjen Robben, Franck Ribery, David Alaba and Holger Badstuber.

Meanwhile, Barcelona will have to do without defender Jeremy Mathieu, although apart from him they have a fully fit squad to select from.

One major storyline about today's game is that former Barcelona Pep Guardiola will be returning to his former employers, and many are wondering whether his new side will be able to take down his ex-team.

Guardiola was hugely popular and successful at Barcelona, where he won 14 trophies during his four year tenure as boss there. He also previously spent 11 years with the Catalan club as a player, winning the league six times with them, as well as one Champions League title.

Barcelona president Josep Maria Bartomeu has insisted that his team do not get distracted by the return of their former boss: "Although he did a spectacular job when he was at Barca, we cannot get distracted. Once the game is over, I'm sure we will see each other in the changing rooms."

Today's big game between Barcelona and Bayern Munich will start at 7.45 p.m. BST (2.45 p.m. ET) and can be watched online through free live stream by clicking here.