Sinclair has been linked with a move away from the Liberty Stadium after he refused to sign a new contract, and Laudrup has admitted that he hopes the saga can come to a swift conclusion so that he can finalise his 25-man squad.
Laudrup said: "If something has to happen, at least the club would have time to react.
"But I have so many experiences with players and clubs with this transfer window. So nothing will surprise me in this world."
Sinclair came off the bench to score in the club's 5-0 win at Queens Park Rangers at the weekend.