Sebastien Haller's name was on a computerised list of players, but a box next to the name of Ajax's record signing was not checked when it was sent to UEFA.
It is a deflating end to a stellar year in the Champions League for Ajax, who eliminated Juventus and Real Madrid on their way to last season’s semi-final
Bayern Munich rule out Arsene Wenger as replacement for Niko Kovac despite Frenchman expressing interest
"Bayern Munich appreciates Arsene Wenger's work at Arsenal, but he is not being considered as coach," a source at the Bavarian club said.
Bundesliga: Bayern Munich expecting to find replacement for Niko Kovac by 23 November, says club president Uli Hoeness
Kovac was sacked on Sunday after 16 months in charge in the wake of Bayern's 5-1 drubbing at Eintracht Frankfurt, which left the defending giants fourth in the Bundesliga table
Bundesliga: Erik Ten Hag says he will finish season at Ajax amid rumours of taking over at Bayern Munich
Bayern Munich sacked Niko Kovac on Sunday, sparking heated speculation as to who the Bundesliga giants could appoint in his place, with Ten Hag reportedly high on the list
Champions League: Bayern Munich stars asked to lift their performance ahead of Olympiakos clash following Niko Kovac's sacking
All is not well behind the scenes at Bayern Munich who dismissed Kovac on Sunday after winning just three of their last six games in all competitions.
Champions League: Manager Erik ten Hag believes Ajax could improve on organisation despite 3-0 win over Lille
Erik ten Hag said that despite the 3-0 result in favour of his side, Ajax could have been more organised as there was a lot of space for counter-attacks
Ajax crowned Eredivisie champions for 34th time after 4-1 thrashing of De Graafschap, complete domestic double
Ajax were crowned Dutch champions for the 34th time on Wednesday after they cruised to 4-1 win at De Graafschap that completed a domestic double
Bundesliga: Niko Kovac's Bayern Munich future in doubt despite potential League and German Cup double
As a rocky first season enters its final act, beleaguered Bayern Munich coach Niko Kovac is fighting for his job.
Champions League: Lucas Moura repays Mauricio Pochettino's faith to fire Tottenham Hotspur into first final
Under Mauricio Pochettino's tutelage, Lucas has been given the opportunity to play to his strengths and now reach the Champions League final — a feat PSG are still trying to achieve.
Champions League: Ajax coach Erik ten Hag proud of team after remarkable run ends with agonising defeat in semi-final
Ajax coach Erik ten Hag expressed pride in his team after seeing their rousing Champions League run come to an end in cruel fashion in the semi-final.
Champions League: Lucas Moura's hat-trick breaks Ajax hearts and propels Tottenham Hotspur into first final
Tottenham Hotspur reached the Champions League final for the first time in their history as a Lucas Moura hat-trick saw them come back from the dead to beat Ajax.
Champions League: Ajax fit and eager to take on Tottenham Hotspur with attacking mindset, says coach Erik ten Hag
A fully fit Ajax Amsterdam will focus on its attacking strengths in their Champions League semi-final second leg against Tottenham Hotspur on Wednesday despite a draw being enough to take them to the final
Champions League: David Neres facing race against time to be fully fit for Ajax's semi-final second leg against Tottenham
Ajax are hopeful David Neres will be fit for their Champions League semi-final second leg against Tottenham Hotspur.
Champions League: Ajax take massive stride towards final with narrow first-leg away win over hapless Tottenham
Ajax Amsterdam took a massive stride towards a first Champions League final for 23 years as Donny van de Beek’s early goal earned a 1-0 win at Tottenham Hotspur in the first leg of their semi-final
Champions League: Injury-hit Tottenham Hotspur need to dig deep to halt free-flowing Ajax in semi-final first leg
Ajax earned themselves the tag of the giant-killers in this year’s Champions League after beating Juventus and Real Madrid in the run into the semi-finals, and will be quietly confident of beating an injury-hit Spurs in the two legs
Eredivisie: Ajax eager to re-sign out-of-favour defender Daley Blind from Manchester United, confirms coach Erik ten Hag
Ajax Amsterdam are eager to re-sign defender Daley Blind from Manchester United if the Dutch side fail to recruit Boca Juniors centre-back Lisandro Magallan