Manchester City have approached Sunderland about the possibility of taking goalkeeper Marton Fulop on an emergency loan, BBC Sport understands.
City are believed to have spoken to the Premier League about bringing in a keeper until the end of the season.
Shay Given will miss City's last three games after dislocating a shoulder in the 0-0 draw with Arsenal on Saturday.
Stuart Taylor is also out and Joe Hart is on loan at Birmingham, which leaves only the inexperienced Gunnar Nielsen.
Fulop, 26, has played 14 games for Sunderland this season but has fallen behind Craig Gordon and Trevor Carson in the pecking order at the Stadium of Light.
I really enjoy what I'm doing with the boys at Birmingham and in training and just try to repay their efforts with my performances
Joe Hart
The Hungarian, who was once Paul Robinson's understudy at Tottenham, has also had loan spells with Chesterfield, Coventry, Leicester and Stoke, and has 20 international caps.
City, Aston Villa, Tottenham and Liverpool are all vying for fourth place in the final domestic league table, which comes with the chance of additional millions of pounds from a lucrative run in the Champions League.
Spokesmen for Villa, Spurs and Liverpool, all said they had "no comment" on the Premier League ruling.
Only two points separate the four teams, with City taking on Villa at Eastlands on Saturday before heading to Spurs on 5 May.
Cannot play media.You do not have the correct version of the flash player. Download the correct version
Last month Chelsea faced a similar goalkeeping crisis, when Ross Turnbull was their only fit goalkeeper for the league game against West Ham, with the west Londoners promoting academy product Rhys Taylor to the bench.
Faroe Islands international Nielsen had never played in the Premier League until the last 17 minutes of the draw at the Emirates Stadium, where Given had to leave the field on a stretcher.
However, City boss Roberto Mancini has no back-up for Nielsen and cannot risk losing another stopper at such a crucial stage as the club push for the fourth Champions League place.
Sixth-placed City cannot recall England international Hart under the terms of his season-long loan deal at St Andrew's, while former Arsenal keeper Taylor is still recovering from knee surgery.
606: DEBATE
Should Man City be allowed to bring in a goalkeeper on loan?
Birmingham City told BBC Sport on Tuesday that they have had no official approach from Manchester City to recall Hart, and the goalkeeper himself said: "As far as I know, that's the way it is - I will be staying here.
"I really enjoy what I'm doing with the boys at Birmingham and in training and just try to repay their efforts with my performances."
Republic of Ireland international Given has been an integral figure between the posts for City since joining from Newcastle in February 2009.
His presence forced Hart, 23, to seek first-team opportunities outside of Eastlands.
"I am devastated for Shay," Hart added. "I texted him. You don't want that to happen to anyone, especially someone like him, a really great keeper and a good person.
"All I can do is wish him a speedy recovery and hope he gets back between the posts as quickly as possible."
Nielsen joined City in 2009 on a free transfer from Blackburn Rovers after a loan spell with Blue Square Premier side Wrexham.
