Lille will consult legal experts before deciding on Monday whether to appeal against UEFA's decision to reject their protest about the validity of Manchester United's winning goal in the Champions League this week.
Les Dogues complained the referee should have blown his whistle before Ryan Giggs took the 83rd-minute free-kick that ultimately won the match for United at Lens' Felix-Bollaert on Tuesday.
Lille players were so incensed the goal was allowed to stand that they threatened to walk off the pitch at the next stoppage of play.
However, UEFA last night not only rejected the complaint, but charged the French club's players with improper conduct.
Lille are upset with the ruling, and are weighing up whether to make another appeal.
A statement released on their the club's website read: 'We regret that UEFA do not wish to analyse the matter.
'The feeling of injustice is shared by all of those who love football.
'This decision can be appealed within three days. We will review our options and our chances with our legal advisers and we will make a decision on Monday.'
UEFA said in a statement last night: 'Having examined the official referee's report, the television evidence at hand as well as the laws of the game, the UEFA control and disciplinary body decided to reject the protest, as there was no proof of a technical error.
'As a result, the body declared that the goal was perfectly valid.
'Furthermore, the control and disciplinary body decided to instigate proceedings against Lille for the improper behaviour of their players immediately after the goal.'