John Carver says he would walk away from Newcastle United if the club ’ s hierarchy had not given him assurances of serious summer investment . Supporters are threatening to boycott the next home match against Spurs in protest at Mike Ashley ’ s running of the club and a perceived lack of ambition . Newcastle have lost the last five Tyne-Wear derbies and , in the wake of Sunday ’ s 1-0 defeat at Sunderland , the owner , head coach and players have come in for strong criticism . John Carver would walk away from Newcastle if the club ’ s hierarchy had not given him reassurances . Fans are threatening to boycott the next home game in protest at Mike Ashley ’ s running of the club . But Carver said : ‘ I can understand that their ( fans ) concern , but we ’ re already addressing it behind the scenes . ‘ Mike and Lee Charnley ( managing director ) know what they have to do . And I ’ m telling you now , if I was sitting here and I thought they were giving me lip service I would say “ thanks very much , I ’ m off - I ’ m walking away from this ” . ‘ If I didn ’ t have enough belief in what they were trying to do and the promises that they ’ ve said about the summer , then I would . But I ’ m not because I know what they ’ re saying to me is right . They ’ ve said that we need to bring players into this football club , first of all to boost the size of the squad , but also to improve the quality , to take us on . ‘ We can ’ t stand still because other clubs are not standing still and they know that . We have to go with them . And if we don ’ t , you get left behind . ' He added : ‘ We ’ ve had different managers but the same group of players ( keep getting beat in derbies ) . There is something in the DNA . Newcastle players train at the club 's training complex on Thursday ahead of Monday 's clash with Liverpool . Newcastle trio Moussa Sissoko , Vurnon Anita and Massaido Haidara take a breather during training . Ryan Taylor attemps to bend the ball around some dummies and hit the target during Thursday 's session . ‘ It ’ s something we need to look at . We struggle when we have to compete . We have talked about addressing that in the summer. ’ Carver concedes that his side – on the back of four straight defeats – still need more than the 35 points they currently sit on to be assured of safety . They travel to Liverpool on Monday before entertaining Spurs a week on Sunday . And Carver has urged fans to get behind the team . ‘ Supporters go to work , pay their money and they ’ re entitled to do whatever they want to , ’ he said in response to news of a proposed boycott . ‘ But we ’ re at the business end of the season now and I ’ m pleading , “ get behind the team , give us your support , because it makes a difference ” . ‘ Especially the situation we ’ re in at the moment , we need as much help and support as we can get. ’ Jermain Defoe ( centre ) connects beautifully with a left-footed volley to score the winner for Sunderland . Newcastle players look dejected following Sunday 's 1-0 defeat to rivals Sunderland at the Stadium of Light .
John Carver insists he would leave the club if they had not backed him . 'If I was sitting here and I thought they were giving me lip service I would say “ thanks very much , I ’ m off - I ’ m walking away from this ” , ' Carver said . Fans are threatening to boycott the next home match against Tottenham Hotspur in protest at Mike Ashley ’ s running of the club . CLICK HERE for all the latest Newcastle news .