Burton goalkeeper Saul Deeney has been ordered to pledge his loyalty to Albion by the end of the week or miss out on the Brewers' FA Cup third-round replay against Manchester United at Old Trafford.
The Irishman was one of the non-leaguers' heroes as Burton drew 0-0 with Sir Alex Ferguson's Premiership giants.
But Deeney's short-term contract expired after Sunday evening's game and Brewers player-manager Nigel Clough has become exasperated while the 22-year-old delays signing a new one-month deal.
Now Deeney has been ordered to make up his mind by Friday or miss out against the Red Devils, with goalkeeping coach Martin Taylor ready to deputise.
Clough said: 'I presume Saul wants to run out with us at Old Trafford next week but he hasn't signed yet and he should remember we have a perfectly capable and experienced deputy in Martin Taylor.
'We do need to sort out his situation and it's become a little bit frustrating because the Manchester United games are more than a showcase for him.
'I actually think he got more credit than he deserved on Sunday.
'He did make a crucial save right at the end but it wasn't as though he had 12 or 15 shots to deal with in the game.
'And that was because the people in front of him did their jobs just as well - if not better.'
Deeney had lapsed out of contract at Notts County during the course of last summer but nevertheless turned up for the first day of pre-season training fully expecting a new deal would be finalised.
However, the Irishman's re-appearance came as a shock to Magpies manager Gudjon Thordarson who had assumed a failure to put pen to paper on a new contract meant Deeney saw his future elsewhere.
And although the keeper was re-employed by County on a short-term basis, he was never given the opportunity to add to his 48 first-team appearances with Thordarson having already signed Kevin Pilkington instead.
Clough then acquired Deeney on loan in October before securing the player on non-contract terms a month later.
But after falling into Clough's bad books, Deeney spent last night's Birmingham Senior Cup quarter-final tie at Stourbridge on the bench and Burton lost 4-1.
'We'd like Saul to stay with us until the end of the season,' said Clough.
'And signing another month's contract will effectively mean exactly that because the transfer window will have closed by the time it expires.
'Saul is going to Ireland for a couple of days and we'll have a serious talk when he gets back.'