Goalkeeper Mark Schwarzer became the oldest debutant in UEFA Champions League history after being selected by Chelsea on Wednesday.
The former Australia international was named in Chelsea's team to face Steaua Bucharest at the age of 41 years and 66 days.
Only Marco Ballotta, who featured for Lazio against Real Madrid five years ago to the day when he was 43 years and 252 days old, has appeared in Europe's premier club competition at an older age.
Schwarzer joined Chelsea on a free transfer in the close season, having reached the UEFA Europa League final with previous club Fulham in 2010.
He also played in the final of the UEFA Cup for Middlesbrough in 2006, and retired from international football last month having earned a record 109 caps for Australia.
Prior to Wednesday's meeting with Steaua, Schwarzer had represented Chelsea in two League Cup fixtures.