Liverpool have signed Robbie Keane from Tottenham Hotspur on a four-year deal. The Republic of Ireland striker underwent a medical at Liverpool's Melwood training ground on Monday and the 28-year-old was then given the all-clear to move to Anfield for a fee of £19 million, which could rise to £20.3m dependent on bonuses.

Keane, a boyhood Liverpool fan, could link-up with his new team-mates on Tuesday in Spain, where Rafael Benitez's side are currently on a pre-season tour, and make his debut for the club in Wednesday's friendly against Villarreal.

"I would like to place on record my thanks to the board, players and fans of Tottenham for the past six years, which were the best and most enjoyable of my career to date," Keane said.

"I will never forget them. I would specifically like to thank chairman Daniel Levy for understanding, that, as a fan, joining Liverpool is a lifelong dream of mine and one I couldn't let pass me by. I hope one day the Spurs fans, who have been brilliant to me, can understand this too.

"I have only good things to say about my time at Tottenham and expect them to go from strength to strength under Juande Ramos and Daniel Levy."

The 28-year-old has been with Tottenham for six years, his longest ever spell with a team following stints with Wolverhampton Wanderers, Coventry City, Inter Milan and Leeds United, and last season became the 15th player to hit 100 goals for the club.

Tottenham also said it would not pursue a complaint it filed to the Premier League about comments made by Benitez during the club's pursuit of Keane.

The Republic of Ireland striker became Benitez's No 1 summer target in recent weeks, after he prioritised the need to replace Peter Crouch above his protracted move for Gareth Barry.

With Xabi Alonso likely to remain at Anfield, it remains unclear where Liverpool will go with their chase for the Aston Villa midfielder. Benitez has had four bids turned down so far and seems unwilling to meet Villa's £18 million valuation for the England international.