Tony Mowbray has called for patience after promising West Bromwich Albion fans that he will lure quality players to The Hawthorns before the new Premier League season begins.
The Baggies have signed just Graham Dorrans and Gianni Zuiverloon since their return to the top-flight was confirmed in May, while Luke Moore, Roman Bednar and Kim Do-Heon have all made their loan moves permanent.
Meanwhile, established first-team players Zoltan Gera and Martin Albrechtsen have opted to leave the club rather than sign new contracts.
But despite the relative lack of transfer activity so far this summer, Mowbray is confident of building a squad capable of competing in the top-flight.
"Nobody is hiding the fact that the squad is not deep enough at the moment," he told the club's official website.
"I am very sure in my mind that we have to get the right players in.
"We do have irons in the fire at the moment, as we have for the last few weeks. When they come to a dead-end you move on to your next target.
"We are ticking a few of them along at the moment and we'll see if they are fruitful.
"As I have always said from the last day of the season, yes we need to improve and help the existing squad.
"I still believe we have a good number of players in the team from last year who are more than capable of playing in the Premier League.
"We just need to give them some help by adding to the quality."