Sherwood, 45, signed an 18-month contract in December, but there has been uncertainty over his future.
“It’s out of my hands but I believe I’ll be here next year,” said Sherwood. “I’m planning for next season. The players are playing for their futures.
“I will sign the players. Nobody else will come in unless I sanction it.”
Spurs – who have Franco Baldini as technical director – did not sign a player in the January transfer window after a summer in which seven high-profile signings, including Roberto Soldado, Christian Eriksen and record signing Erik Lamela, were recruited.
The departure of Wales forward Gareth Bale to Real Madrid was one of 12 deals which saw players leave the club.
“The manager has got to work with the players, so unless he gets the players he wants it’s always going to be an uphill task,” added Sherwood. “He will always have the excuse of, ‘well, they’re not my players’.”
Sherwood, who joined the club as a coach in 2008, guided Spurs to 16 points from a possible 18 after the sacking of Andre Villas-Boas in December, but Tottenham could slip to a fourth successive defeat when they face Benfica in the Europa League on Thursday.
They trail 3-1 on aggregate and while the former Spurs midfielder has asked for “patience”, the dip in form has raised further questions about his future.
Netherlands manager Louis van Gaal, who has been linked with the role, said on Wednesday his “ambition is to coach a top team in the Premier League”.
Sherwood added: “Van Gaal has got a good track record, he is a good manager and I’m sure he’ll get his opportunity. He’s been shouting loud enough for it.”