Chris Wilder expects the transfer market to "ramp-up" this weekend after admitting his Sheffield United squad still need strengthening ahead of the new Championship campaign.
Ipswich Town centre-forward Martyn Waghorn and Ben Woodburn of Liverpool and Wales have both emerged as targets as United turn their attention to attack following the arrivals of John Egan, David McGoldrick and Dean Henderson.
Although Wilder has yet to secure either player's release - negotiations aimed at securing Waghorn's release are being complicated by his club's asking price - the United manager said: "I think it's going to be an interesting week. You'll probably see things start to ramp-up everywhere over the next few days and then going into next week.
"Listen, it's a difficuolt market. You're seeing that elsewhere and not just here. We can't dictate to the market but we are trying and, yes, we have had some encouragement."
Although Wilder refused to reveal whether that concerned Waghorn, Woodburn or other alternatives options, he added: "We're still a little bit light but we're working and working extremely hard to bring a couple in. We know the areas where that needs to be and hopefully we'll get those sorted pretty soon."
United will enter next weekend's opener against Swansea City unbeaten in pre-season following last night's victory over Doncaster Rovers. Second-half goals from McGoldrick and Billy Sharp sealed a 2-0 win over opponents who, Wilder admitted, caused his side plenty of problems before the break.
"I'm pleased with how its gone," he continued. "I'm pretty pleased with where we are at the moment. There's a few things we still need to work on, as you would expect, but overall I think we're in a pretty good place."
Ryan Leonard, George Baldock and Enda Stevens all missed the visit to the Keepmoat Stadium but Wilder added: "They'll all return to training on Monday. We didn't want to take any silly risks with them. It's only impact injuries they've got, nothing serious."