Daniele Orsato will referee the Chelsea-Real Madrid match

It'll be the fourth time he has overseen a Champions League match involving our team.
Daniele Orsato will officiate the Champions League semi-finals second leg match between Chelsea and Real Madrid at Stamford Bridge (Wednesday, 9pm CEST). The Italian referee will take charge of a match involving Zidane's side for the fourth time in this competition. 

The first was in the win over Malmö at the Santiago Bernabéu (8-0), during the Group Stage in the 2015/16 season. The second time was in the 1-0 win over Galatasaray at the Ali Sami Yen in the third game of last season Champions League group stage. Most recently, also last season was in the round of 16 against Manchester City, which ended in defeat.