Jack Ross admits that he wants to secure extra strength in depth before the transfer window shuts next week.
However, the Sunderland boss cut an upbeat figure after landing the signing of Charlie Wyke on Wednesday and said his squad is in a 'reasonable position'.
Wyke became Sunderland's eleventh summer signing after joining from Bradford City, and the Black Cats are keen to add even more firepower in the coming days.
Ross stressed that further outgoings were possible and that could impact what he needs to do with regards to his coming squad.
He said: "I think that we probably could still do with a little bit more strength in depth in certain areas. I’d also be loathed to say that no more will leave. I think that Callum's [McManaman] departure shows how quickly things can change, particularly with the permanent window closing so quickly this year. That may affect us and other clubs. If there were any more outs then that would influence what we need to bring in.
"Certainly, if the window was to shut now we’re in lot stronger than we might have imagined we would be, we've done a heck of lot of work to get into a reasonable position going into the first game."
Ross added that he hoped Wyke would be available in a few weeks as he recovers from injury and said that he was 'delighted' to land the 25-year-old.
"I'm naturally delighted, it was well documented that we'd pursued him for a while," he said.
"We had to remain patient, it would have been easy to move on quickly because you run the risk of potentially missing out on other players, but we always believed we'd get him, he wanted to come here as well which was an important part of it.
"We hope [he'll be available] sooner rather than later, he should be back involved with me in the next three weeks. It might take a little longer but that's the aim. He's desperate to be involved because his injury record and his appearance record over the last few years is very good.
"We've had to prepare all pre-season without a number nine so having him not available, I'd much prefer to have him but we are used to it after the pre-season campaign."