​The second leg of Manchester United's ​UEFA Champions League quarter-final tie against ​FC Barcelona at ​the Camp Nou on April 16 will be officiated by Felix Brych, which could bring some cause for concern in the Catalan camp.

The hugely experience German referee is one of the most regular choices of referees when it comes to the business end of the Champions League.

Brych notably oversaw the 2017/18 Champions League final as Real Madrid lifted the trophy. He also officiated in the 2013/14 Europa League final when Sevilla became champions.

With regards to the last four of the competition, Brych has officiated as many as two Champions League semi-finals, one of which saw Barcelona lose to eventual champions Chelsea in 2012.

​Marca report that there have been four other instances when this referee has officiated in a Barcelona game and the reigning Spanish champions have not done well in those games historically as they have only beaten Atletico Madrid 2-1 in the 2016 quarter-finals and Manchester City 2-1 in the round of 16 in 2015.

The Catalan giants drew against AC Milan in the year 2013's group stages and lost 2-1 to Atletico Madrid in the 2014 quarter-finals, in addition to the Champions League final loss to Chelsea, all of whom were officiated by Brych.