Berahino, 22, had emerged through the ranks at The Hawthorns before hitting the headlines in 2013 with a winning goal against Manchester United at Old Trafford.
Last season, the Burundi-born forward hit 20 goals for the Baggies, establishing himself as one of the top young attackers in English football.
Those exploits in front of goal have triggered interest in his signature, with West Brom confirming on their official website last week that they had rejected two bids from Tottenham for Berahino's services.
On deadline day yesterday, Sky Sports reported that Spurs had failed in a further two bids - the final offer totalling £23m - for Berahino, meaning West Brom chairman Jeremy Peace had thrown out a total of four bids over the last few weeks.
Now though, The Mirror believe that, whilst Berahino is unhappy that he hasn't been allowed to leave, manager Tony Pulis is also far from happy.
The report describes him as 'bitterly disappointed' that West Brom didn't sell their wantaway striker, because he wanted to reinvest the money in the rest of his squad.
As it was, Berahino stayed at West Brom past the deadline, and the Baggies were unable to add any more players to their squad - much to Pulis' frustration.
He must now find a way to keep Berahino happy at The Hawthorns, as the transfer window will only open again in January - and he must also plug on with his current squad having been prevented from making any new signings on deadline day.
Spurs, meanwhile, have failed to add ample support in attack for Harry Kane, and the failure to sign Berahino will no doubt anger manager Mauricio Pochettino - meaning that neither manager is happy with Berahino remaining at West Brom.