Romelu Lukaku ’s Chelsea  future has been thrown into doubt after his agent admitted that he has been talking with clubs like Tottenham  over a potential move in the summer. After two consecutive loans spells, it is highly unlikely that Chelsea would be looking at yet another loan deal for the 21-year-old. He has been impressive for Everton this campaign. His 13 league goals has helped Roberto Martinez’ men to challenge for a top four spot with six matches remaining.Rumours about the potential sale in the summer in order to fund the transfer of Diego Costa have been making waves over the last few weeks. The comments by Lukaku’s agent, Christophe Henrotay, to De Standaard has given the biggest hint that the striker could be set for pastures new. He said:"I'm looking for a club for Romelu. And yes, I've talked to Daniel Levy once, but that doesn't mean Romelu will definitely join Spurs. That's not a talking point at this moment."There aren't 20 teams that can afford to buy Romelu. He won't go from Everton to, let's say, Swansea."There's also a difference between Everton that plays against relegation and an Everton that fights for European football."romelu lukakuIf Lukaku is officially available for transfer, then a number of clubs would show interest in him. The striker has consistently shown in the last 18 months that he is capable of scoring on a regular basis even for teams lower in the division. The player is also likely to give preference to clubs playing in the Champions League. So far, there have not been any rumours linking him with Champions League clubs.Tottenham are the closest to offering him the same right now. After the sale of Jermaine Defoe, the club still has not been able to see the best of Roberto Soldado. They could be willing to cut their losses on the £26 million signing and bring in Lukaku as the main striker alongside Emmanuel Adebayor.Lukaku’s potential as a player does not appear to be the reason behind his sale. His war of words with Jose Mourinho after being loaned out to Everton at the start of the season appears to be the main reason.