Middlesbrough have tipped for promotion for the coming season.
They have been placed as the second most likely team to win promotion, but Pulis is still wary that he needs to bring in players to make that happen.
For Saturday's game against Millwall, they had to go without captain Ben Gibson, who recently completed £15million move to Burnley.
During this transfer window, Patrick Bamford was sold to Leeds, while Muhamed Besic returned to Everton at the end of his loan period.
Adama Troare, who is being targeted by Wolves, and Daniel Ayala.
"They're top players." Pulis commented.
"We know we have to bring players in," Pulis continued, before admitting, "That group is not good enough to get us promoted. It’s a smashing group but it’s not good enough to get us promoted."