Chelsea have been unsuccessful with their first official attempt to sign Sporting Lisbon’s Viktor Gyokeres. The Blues have been linked with several forwards already during the January transfer window, including Viktor Gyokeres. Now, there’s speculation that claimsMauricio Pochettino’s side launched an attack to try bring Sporting’s talisman to Stamford Bridge. Record claims that Portuguese giants Sporting rejected a proposal from Chelsea for Gyokeres in recent days. It is explained that Chelsea have just submitted a bid worth around €85 million (£73m) for the in-form striker, but that was imme…