West Bromwich Albion manager Tony Pulis has told the Daily Mail that Saido Berahino needs to "grow up" as he prepares to reintegrate the striker back into his squad.
Berahino, 22, wrote on his Twitter account last week that he would never play for West Brom agan after the club rejected a number of bids from Tottenham during the transfer window.
The striker's tweet, which was later deleted, said: "Sad how I can't say exactly how the club has treated me but I can officially say I will never play [for chairman] Jeremy Peace."
Berahino was given extra time off by West Brom following the incident and he was included in their squad list for the 2015-16 Premier League season.
He trained as normal at West Brom after his strike threat but is yet to hold any talks with the club, Press Association Sport reported.
The striker returned to the Baggies' training ground as expected on Monday, taking part in the afternoon session with the first team before returning home as Albion look to reintegrate him back into the squad after the transfer drama.
Pulis said: "Saido wants to test himself at the highest level, to push himself to his limits, against and with the top players in this country.
"Every sportsman should be allowed the opportunity to better themselves in life, to be ambitious and not to settle for the comfort zone. Saido's problem has been how he's gone about it, and how he has been manipulated into situations that have put him in such a bad light.
"Respect has to be earned and Saido has to learn that lesson. West Brom have nurtured Saido's career for over a decade, the people in the club and on the terraces have supported him, and given him the platform from which he stands today.
"They deserve the utmost respect and at times unwillingly he has shown them little. Do I think he's meant it? Of course not, but he has to grow up and wise up to the fact that people at West Brom have supported him right from the beginning of his career.
"I spoke to Saido and told him not to get involved in anything else but football, but again -- unfortunately -- he didn't listen. By handing in a transfer request, he only antagonised the whole situation.
"Saido listens to the last person who speaks to him and does things that are not reflective of him. He also brought his mum in one day to have a meeting with Jeremy and I don't think that helped.
"It's almost like he is influenced by the last person who talks to him. He lacks real mentors in his life. He lost his dad very early and I believe that played a pivotal part in his behaviour.
"There should be mentors in academies, more ex-senior players involved with the youngsters, to mix with them, integrate and tell them about their experience of the game and their careers -- they could play a big part."
Pulis added: "It will be difficult to integrate Saido into this group. His attitude will be questioned. The lads are very honest and hardworking and Saido will have to show that in abundance.
"The supporters will also be looking for a player who wears their badge with commitment and honesty. They are extremely proud of this famous club and will want to see Saido showing the respect they deserve."