Atletico Madrid are supposedly plotting a summer bid for Jose Callejon, a move that would appear to pose a rather large threat to Chelsea's hopes of signing the Napoli forward.
Both the Blues and reigning Premier League champions Manchester City have been credited with an interest in Callejon in recent weeks, with both clubs reportedly willing to pay approximately £10 million for the signature of a player who has previously been given a rather hefty £24 million price tag following an impressive season in Serie A.
However, according to the latest speculation from talkSPORT, it is La Liga champions Atletico who are attempting to manoeuvre themselves into pole position to sign the talented Spaniard, with the club planning a £16 million offer for his services.
27-year-old Callejon - whose impressive versatility allows him to be deployed either as a striker, an attacking midfielder or a winger - only moved to the Stadio San Paolo from Real Madrid last year, yet his consistent displays under Rafael Benitez have clearly attracted a lot admiring glances from overseas.
Atletico boss Diego Simeone is obviously desperate to bolster his forward line in the near future, with the Argentine presumably eager not to allow last month's departure of star striker Diego Costa to Chelsea to have too much of a detrimental impact on his side's chances of retaining their domestic title next season.
A mini-exodus was always likely to be on the horizon at the Vicente Calderon following such a surprisingly successful campaign, but Simeone - who has also lost the services of former long-term loanee Thibaut Courtois, left-back Filipe Luis and veteran frontman David Villa - is evidently not one to rest on his laurels, something that has already been perfectly demonstrated by the capture of Croatian international Mario Mandzukic from Bayern Munich.
While Manduzkic will be perhaps be most heavily relied upon to live up to Costa's formidable reputation in front of goal, the addition of Callejon would unquestionably add an extra dimension to Atletico's attack that would prove difficult to defend against.
With both Real Madrid and Barcelona having already made significant additions to their squads already this summer, Atletico must continue to strengthen if they are to have any hope of continuing to challenge their more illustrious rivals for major honours on a regular basis.
Watch: The latest Chelsea transfer news
Chelsea/Manchester City tempted to bid?
Whether Chelsea or Manchester City will be tempted or indeed willing to lodge a concrete offer of their own for Callejon in light of Atletico's increasingly strong interest remains to be seen.
Chelsea boss Jose Mourinho already has a number of attacking midfielders and wingers at his disposal at Stamford Bridge, although he could feasibly be keen to add another striker to his squad to compliment Costa before the new season, with Demba Ba on the verge of joining Turkish title contenders Besiktas and Samuel Eto'o having left West London following the expiration of his one-year contract.
Manchester City, meanwhile, could be focusing their attentions on pursuing attacking recruits for the remainder of the window having already bolstered their defensive options with the respective signings of former Arsenal right-back Bacary Sagna and Malaga goalkeeper Willy Caballero in recent weeks.
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