Kevin Keegan said he was undaunted by the task ahead when he was presented as Newcastle United's manager at St James' Park yesterday.

The 56-year-old has returned from a spell out of the game to take over for a second time, having achieved cult status with the fans in his previous stay from 1992 to 1997.

"It's definitely the only club I would come back for," Keegan, also a former England manager, told a news conference. "This club doesn't scare me, the job ahead doesn't scare me.

"I'm the best-qualified person to come here and do this job. Every time the job comes up there is a bit of envy. You think 'that could be me'. That's how I felt every time the job came up.

"I left because of circumstances last time, because I didn't think the club was going where I wanted it to."

Keegan replaces Sam Allardyce, who lasted just eight months in the job. He began work on Thursday and takes charge of his first match in charge against Bolton Wanderers in the Premier League today.

Asked about a possible coaching position for former Newcastle captain and fan favourite Alan Shearer, Keegan said: "If there's a role that Alan wants, then I would love to talk to him."

Newcastle are lying mid-table, just six points above the relegation zone, but Keegan believes he can make them challengers for silverware again.

"(Owner) Mike Ashley said he wants to win something," said Keegan, who came close to winning the league title last time.

"That might sound a tough challenge but it's possible to win a cup here and possible for this club to break into the top four.

"Despite the sceptics we did it once before, people laughed but we nearly did it."