Manchester United manager Louis van Gaal's defensive woes could continue this weekend after it was revealed Marcos Rojo has not yet been registered by the Premier League.
The Argentine defender completed a £16m move from Sporting Lisbon to United last week but was unable to play against Sunderland on Sunday because his documentation was not processed on time.
Now the 24-year-old could miss yet another Premier League match after complications with his third party ownership, reports the Daily Mail.
The delay has reportedly been caused after sports management company Doyen Sports claimed it was owed 75% of Rojo's transfer fee.
The company, which also has stakes in players including Manchester City's Alvaro Negredo and Monaco's Radamel Falcao, describes itself as a "private fund dedicated, amongst other activities, to providing an important and growing alternative source of financing for football clubs".
The complication has left United and the Premier League in a race against time to complete the registration, which must be finalised by 12pm on Friday if Rojo is to play against Burnley on Saturday.
Van Gaal will be hoping the left-sided defender will be ready to make his debut at Turf Moor after watching his side concede seven goals in three games so far this season, including the humiliating 4-0 defeat to MK Dons in the League Cup.
United will be without Luke Shaw for at least another week, although Chris Smalling could return from a groin injury he picked up in the 1-1 draw against Sunderland.
Johnny Evans has meanwhile backed himself and United to bounce back from their early cup exit.
"The lads are disappointed. We started the game really well and could have got a goal or two.
"But then there were some sloppy mistakes, including my pass for their first goal and from that point we made it quite difficult for ourselves," the Northern Irish defender told United's official website.