Newcastle United still want to sign striker Yoane Wissa, but will look at other options if Brentford's demands are too high.
Newcastle have a price in mind that they are willing to pay for the forward, who scored 19 Premier League goals last season. They have already had a £25m bid rejected.
One source has told Sky Sports News Wissa does not intend to return to Brentford training and he feels disappointed with the club's approach in talks.
Wissa wants to join Newcastle and wants to play Champions League football as he feels he may not get another opportunity.
Newcastle were lining up Wissa to be second-choice to RB Leipzig striker Benjamin Sesko if Alexander Isak was to leave the club.
The 28-year-old left Brentford's pre-season training camp in Portugal earlier this week and headed back to the UK for talks with the club's hierarchy over his future.
Sky Sports News reported that Brentford do not want to sell him after they sold Bryan Mbeumo to Manchester United for £71m.
The pair scored 39 Premier League goals between them last season, so the club are acutely aware of the risk in letting both leave, especially without replacements.
After losing Mbeumo, captain Christian Norgaard and head coach Thomas Frank already this summer, Brentford are not about to dismantle their entire team.
Brentford are yet to replace Mbeumo but remain interested in Omari Hutchinson at Ipswich, after a potential deal fell through over payment structure earlier in the window.
Andrews: Wissa will return to Brentford training
Brentford boss Keith Andrews said on Friday night that Wissa will return to training with the squad next week.
"He has gone back to London. It was his decision, obviously because of speculation," Andrews told Brentford's club media after his first game in charge ended in a 1-1 draw against Gil Vicente.
"There are clubs interested and he felt it was the right thing to go back to London.
"It's simple really, he folds back into the group next week when we come back to training."
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