West Ham United manager Sam Allardyce hopes to supplement his squad with as many as four additional signing before the start of the new Premier League season.
The Hammers have already added Mauro Zarate, Cheikhou Kouyate Aaron Cresswell and youngster Diego Poyet to their squad ahead of the new campaign to help improve on a 13th place finish last term.
But Allardyce isn't finished with his summer tinkering and wants further additions including two new defenders, a midfielder and striker to bolster the West Ham ranks.
"I think there are three or four positions - it depends on the budget," he said. "You would say there is still room for a young central defender, particularly a left-footed one because we do run with three and not four.
Ideally, you would have four. You would also say we need another left-back to go along with Aaron and I think a front-line player and the possibility of a midfield player as well."
Among the players linked with moves to West Ham include Ecuador striker Enner Valencia, Dnipro winger Yevhen Konplyanka and Hull defender Michael Dawson and the remainder of the summer transfer window is expected to be busy for the Upton Park club.
West Ham battled against relegation for much of the last campaign, with Allardyce coming under pressure from supporters for his style of play.
Allardyce has since agreed to conform to a more attractive style, appointing former striker Teddy Sheringham as an attacking coach in exchange for additional funds in the transfer window.
Andy Carroll became West Ham's record signing last summer an club captain Kevin Nolan is confident further additions are imminent.
"The gaffer and the board are working hard to bring in additions to strengthen our squad," said Nolan. "I know there is and will be continuing work to bring in more to add to what we have here in the squad already and enable us to start as strongly as possible."