How does it work?Thirty-six sides entered into the new "league phase" and now just four remain with a month-and-a-half to go in the UCL campaign.Barcelona, Paris Saint-Germain, Arsenal, and Inter Milan are through to the semifinals,

Arsenal hosts Paris Saint-Germain on Tuesday in the semifinals of the UEFA Champions League. Here is what you need to know before the kickoff of the first leg.

A place in the Champions League final is on the line as Arsenal and Paris Saint-Germain battle over two legs. Fresh from two famous European nights against Real Madrid, Mikel Arteta’s side will be full of confidence as they begin the last-four encounter.