Chelsea and Manchester City have been scouting Valencia midfielder Mehmet Topal for two months, according to his agent reports the London Metro.
The 25-year-old Turkish international has been heavily linked with a move to the Barclays Premier League, and speculation hass intensified following comments from Batur Altiparmak.
Blues boss Andre Villas-Boas is under increasing pressure at Stamford Bridge, and the Portuguese tactician will look to further strengthen his Chelsea squad when the transfer window reopens in January.
Topal is just one player believed to be on Villas-Boas' wish-list, and whilst no firm bid has yet been made, Altiparmak thinks that could all change, if not in the New Year, then at the end of the season.
"They [Chelsea and Manchester City] have been watching him for two months now but I must stress there is nothing concrete from either club," he told the International Business Times.
"We will reassess his future at the end of the season. He is happy in Valencia and has two and half years left on his contract.
"Obviously if the opportunity arose for him to take the next step in his career he would like to take it, but only if Valencia are willing.
"The Premier League is one of the best in the world but so is the Spanish Primera Division."
With a reported buy-out clause of just £8.5million, the fee needed to bring Topal to Stamford Bridge or the Etihad Stadium is well within both Chelsea and Manchester City's respective budgets, so a move could be engineered in the near future.
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