Prospective new Manchester United coach Ruben Amorim is expected to remain in charge at Sporting until next month's international break.
There remains confusion over whether a deal has been completed for Amorim to take over at Old Trafford after Erik ten Hag was sacked on Monday.
United board member Sir Dave Brailsford told fans "it's done" as he arrived for Wednesday's EFL Cup win with Leicester and posed for a photograph. This information has been corroborated by additional sources from Portugal.
However, Sporting officials are adamant there is still no official deal and talks are continuing.