Tues 15th February
Sporting Lisbon v Manchester City
Referee - Srdjan Jovanović SRB
Assistant referees - Uroš Stojković SRB, Milan Mihajlović SRB
Fourth official - Novak Simović SRB
Video Assistant Referee - Marco Fritz GER
Assistant Video Assistant Referee - Harm Osmers GER
UEFA Referee Observer: Björn Kuipers (NED)
UEFA Delegate: Per Eliasson (SWE)
UEFA Referee Liaison Officer: António José Almeida Marçal (POR)
PSG v Real Madrid
Referee - Daniele Orsato ITA
Assistant referees - Ciro Carbone ITA, Alessandro Giallatini ITA
Fourth official - Daniele Chiffi ITA
Video Assistant Referee - Marco Di Bello ITA
Assistant Video Assistant Referee - Massimiliano Irrati ITA
UEFA Referee Observer: Lucílio Cardoso Cortez Batista (POR)
UEFA Delegate: Angelo Chetcuti (MLT)
UEFA Referee Liaison Officer: Claude Cauvet (FRA)
(edited to include observers-Hertsref)