THE Champions League semi-finals are upon us with some incredible action kicking off tonight.

All Premier League clubs have been eliminated from Europe's esteemed competition meaning there will be no English representation in the final at Wembley on June 1.

Manchester United and Newcastle endured a disappointing campaign that saw them getting knocked out in the group stage.

Arsenal and Manchester City were eliminated by Bayern Munich and Real Madrid respectively during the quarter-finals.

City have officially surrendered their crown which will pass on to either Real, Bayern, Paris Saint-Germain or Borussia Dortmund.

The semi-finals kick off tonight with Madrid facing off against Harry Kane and co at the Allianz Arena before PSG and Dortmund square off at the Signal Iduna Park on Wednesday.

Many fans worry they might lose some of their key players who have amassed too many bookings ahead of the second leg or even the final - SunSport has the answers below.

When do yellow cards get wiped in the Champions League?

Fans of teams in the last four have no reason to fear, as yellow cards expire after the quarter-finals and are not carried over to the semi-finals.

According to Uefa's Article 52.04, all yellow cards and pending yellow-card suspensions expire on completion of the play-offs and are not carried forward to the group stage.

They are also wiped out on completion of the Champions League quarter-finals and are not enforced during the semi-finals.

The same article states that even if a player is cautioned across both semi-final legs, he cannot be suspended for the final unless he received a red card.

And according to Article 52.05, cautions and pending yellow-card suspensions that occurred in major UEFA competitions expire at the end of the season.

That means Kane will not miss out on a London return for the final if Bayern make it through and his dreams of finally winning silverware remain alive.

That is, of course, if the star striker doesn't get sent off in the second leg against Real.