Manchester United goalkeeper David de Gea is making the club sweat over the signing of his new deal, and could wait until as late as January before deciding whether or not to commit his future. 

De Gea, whose current contract is set to expire at the end of the season, has already agreed fresh terms in principle with the club worth around £350,000-a-week, but he is yet to put pen to paper on the deal. 

David de Gea

And, according to a report from The Sun, the Spaniard could prolong the signing of that deal until as late as January, by which time other clubs could make contact with the player over a free transfer at the end of the season. 

It is understood that one of the greatest stumbling blocks in the sealing of this new agreement, which would commit the 28-year-old to six more years at Old Trafford, is a policy at United regarding Champions League qualification. 

That policy dictates that players are obliged to take a 25% pay cut should Ole Gunnar Solskjaer's side fail to qualify for Europe's premier club competition come the end of the season.

That would render de Gea's lucrative £350,000-a-week at just £263,000-a-week. 

Among the club's eagerly tracking the Spanish international's situation are long-time admirers Real Madrid and Paris Saint-Germain, who would both be able to enter into pre-contractual talks with the player come January. 

​De Gea, who had his deal extended by a further year at the end of last season thanks to a clause inserted by the club, would become the highest-paid custodian in the world with that £350,000-a-week paycheck.