When you think of Chelsea's greatest 30 players, you don't necessarily consider Jesper Gronkjaer to be among that list, but if it wasn't for the Danish winger, the Chelsea as we know it today would not exist.
Gronkjaer scored 11 goals in 119 appearances for the Blues, but his crowning moment came on the final day of the 2002-03 campaign. Chelsea and Liverpool went head to head at Stamford Bridge with a Champions League place at stake, but for the West Londoners, they were fighting to survive and defeat would have left them financially crippled.
Sami Hyypia struck an early blow for the Merseyside giants before Gronkjaer crossed for Marcel Desailly to head home the equaliser. Gronkjaer wasn't finished, however, as he cut inside John Arne Riise before curling a left-footed effort into the far corner to give Chelsea an advantage that they would maintain for the rest of the match.
In the weeks after one of the most memorable days in the club's history, it emerged that Roman Abramovich had bought Chelsea, and since that day, the Russian billionaire has bankrolled a revolution at the club which has resulted in four Premier League titles, four FA Cup trophies, three League Cups, a Europa League and a Champions League crown.
He may have spent his days at Chelsea as a quick, inconsistent wide player, but Gronkjaer's contribution on May 11, 2003 ensured that Chelsea had a future.