Heurelho Gomes believes Tottenham could find it difficult to retain their key stars if they fail to qualify for the Champions League - but he has not yet ruled out hope of winning this season's competition.
Spurs' hopes of an upset against Real Madrid took a severe blow last week as they suffered a 4-0 defeat at the Bernabeu in the first leg of their quarter-final.
Harry Redknapp's men, though, have already shown an ability to fight back in the competition this season having responded well to defensive collapses against Young Boys in the qualifying stages and Inter Milan in the group.
Gomes was also part of the PSV Eindhoven side that won the Eredivisie title in 2007 courtesy of a 5-1 win over Vitesse Arnhem, and he believes Tottenham can produce a "miracle" comeback when they host Madrid on Wednesday.
He said: "We have shown a lot of character before to come back from difficult situations and I think we can show it again, so why can't we win it and go through? At PSV in the 2006-07 season, it was the last game of the season, and, if we beat Vitesse at home, by five goals, we'd win the competition.
"We won 5-1 and Ajax only won 3-0 so we won the league on goal difference by one goal. We won the title when no-one thought we could do it. Miracles can happen."
If the miracle does not happen, though, Spurs will have to secure fourth place in the league. Currently fifth and with a game in hand over Manchester City, their destiny is still in their own hands but they have to face Arsenal, Chelsea, City and Liverpool in their remaining seven games.
There have been suggestions that the likes of Gareth Bale and Luka Modric could consider their options if they fail to make it. Gomes does not dispute that playing in the competition is likely to be a huge factor in top players' decisions, but he firmly believes they are capable of another fourth-place finish.
"When you play Champions League, every player wants to sign for Spurs, and maybe without Champions League it's a little bit difficult to sign very good players, and also to keep the best players," he said.
"We love playing in the Champions League. It is a massive competition. We have beaten the top teams before and we can do it again. To finish in the top four, we need to beat them."
Gareth Bale added in Marca: "Anything is possible in football. This sport's history is full of incredible, crazy games. Madrid lost 4-0 at Anfield not so long ago. Why can't we do it ourselves?
"We are going to try and we're not going to give up. It's an almost impossible challenge, but we're going to play and see what happens. Hopefully we can produce the miracle. We need to be optimistic. We're going to go out to win from the start."
Aaron Lennon trained with his Tottenham team-mates on Tuesday morning, raising hopes that he will be fit for the game.
Lennon withdrew from last week's quarter-final first leg in the Spanish capital at the last minute due to illness.
The England winger missed Saturday's 3-2 Premier League victory over Stoke with the same problem, but looked sprightly as he trained with the rest of the Spurs squad at their base at Chigwell, Essex.
Steven Pienaar also trained with the squad and could be set for a return from the groin injury which has troubled him recently.
Neither Vedran Corluka (ankle) nor Niko Kranjcar (foot) took part in the session, though, and both are doubtful.