Martin Skrtel
Skrtel's agent admits an offer from Napoli could prove to be tempting. (Reuters)

Martin Skrtel's future at Liverpool has been cast in further doubt after the defender's agent admitted the player will evaluate any offers that come in from Napoli this summer.

Despite signing a new contract with the club last season, the Slovakian international has played a peripheral role at Liverpool throughout 2013, losing his place in the first team to Jamie Carragher in the second half of the season.

Despite the veteran defender's retirement, Skrtel's future at the club is no less assured, with Brendan Rodgers having already brought in Kolo Toure to bolster his defensive ranks and with his eye on a number of further additions to his squad.

Rafael Benitez, the man who brought Skrtel to English football five years ago, has been linked with a reunion with the defender at Napoli, where the Spaniard was appointed manager last week. Skrtel's agent Karol Csonto has since revealed that a move to the Stadio San Paolo could very much well be in the offering.

"Martin has a three year contract with the Reds and is happy to be part of the prestigious club," Csonto told Tutto Mercato. But while admitting there has yet to be an offer from Napoli, the agent indicated that any forthcoming interest from the Serie A outfit will have to be carefully considered.

"It is too easy to say, but if there is contact from the Blues then we will begin to evaluate it. Napoli are a great club and Benitez is a great coach, but Skrtel is a Liverpool player and for this reason he is already looking to the next season with the Reds."

Skrtel, who arrived at Anfield in January 2008 for a fee of £6.5 million, made just four Premier League starts in 2013, after falling drastically out of favour with Rodgers.

Although the departure of Carragher and the continued uncertainty surrounding the future of Sebastian Coates suggests Rodgers will be in need of at least two additional options at centre half for next season, Skrtel's future is still in doubt.

After a season where his performances fell well below his usual standard, the 28-year-old admitted last month he does not know what the future holds.

"I have not had any specific offers but if some should come and they interest me, I would probably consider it seriously," The Slovakian international was quoted as saying in the Guardian. "The club has the biggest say in this in any case, because they have the right for it with me being contracted.

"I am not saying that I want to leave at any cost. I feel sorry for what happened in this season. But I have been here for five and a half years and I have built a position here."