Alan Pardew ordered Arsenal to put up or shut up over their pursuit of Yohan Cabaye after seeing Newcastle snatch a dramatic 1-0 victory over Fulham.
The 27-year-old France midfielder was introduced to a mixed reaction from the club's fans as a 65th-minute substitute in Saturday afternoon's Barclays Premier League win.
Compatriot Hatem Ben Arfa proved the match-winner, but Cabaye's future remained one of the main talking points after the final whistle with Monday night's transfer deadline fast approaching and no second bid from the Gunners having yet materialised.
Asked if the former Lille midfielder had played his last game for the club, Pardew said: "I don't know until 11pm [on Monday].
"We have told his agent, 'Look, come on, play the game', because we have got to replace him [if we sell him] and we can't afford to replace him before he goes because we're not sure he is going to go.
"That bid needs to come in, if it's coming in, early. If not, it won't happen - well, I think it won't happen, but you can never tell with this football club.
"We have got replacements in mind, but we need to act quickly if that bid comes in. We still hope to get an offensive player in before 11pm [on Monday] and we are working towards that."
Both the Cabaye saga and Newcastle's search for reinforcements are ongoing, but thankfully for the club, their wait for a home win in the league is not after it came to an end at the fifth attempt.
It did so in fitting style with Ben Arfa's superb 86th-minute strike, the Magpies' first league goal in 411 minutes of football, worthy of winning any game.
Pardew said: "The goal came from Hatem and I was pulling my hair out today with him. He was making bad decisions in terms of his selection of pass, he was not really doing what we want him to do in that wide area.