Everton are haggling over terms with Chelsea for the loan of Christian Atsu.
The Daily Mail says Chelsea want assurances that the Ghanaian will play regularly in the Premier League next season ahead of his return to Stamford Bridge for the 2015-16 season.
Roberto Martinez, however, is reluctant to offer such guarantees, something that has cast doubt over the deal.
Both clubs are still open to the deal taking place, but the issue must be resolved before the move can be ratified.
