Hull head coach Marco Silva is waiting to learn whether both new signings, Oumar Niasse and Evandro, will be available for his first Premier League game in charge on Saturday against Bournemouth.
Senegal international Niasse, 26, has joined on loan from Everton until the end of the season, while Hull paid Porto an undisclosed fee for Brazilian Evandro, 30.
The Tigers have yet to receive international clearance for Evandro, who has signed a two-and-a-half-year deal and teams back up with Silva after the pair worked together at Estoril.
"At this moment I don't know if they are available or not for the game tomorrow," said Silva, installed by the club last week after they had sacked Mike Phelan.
"It's possible, but we'll see. These are two players who have come to improve our squad in two positions we needed.
"Evandro's a smart, clever player. He's a creative midfielder who has come to help our team. He's an expressive player.
"He always tries to do things well, which is important. He's a very good professional.
"Niasse is a striker, a strong, fast player. He's not a normal number nine, always playing in a fixed position. "
Silva confirmed he was still looking to add to his squad in his bid to steer the Tigers off the foot of the table, starting with Saturday's visit of Bournemouth when they hope to end a nine-game league run without a win.
"I'm happy because we signed these two players and next week, maybe, we have more news," he said.
"It's important for the players, the club, for our fans also."
Silva refused to be drawn on the future of midfielder Robert Snodgrass or confirm whether West Ham had made an improved bid after an initial offer last week had been turned down.
"It's not the most important to talk about this," Silva said.
"I want the player focused on the game tomorrow, that's most important for me and for our team and our players.
"We've spoken of course, but at this moment he's our player and he's an important player for our team and for now there is nothing new.
"Snodgrass is a good player. He's had a good season, but he's our player. He's important for us."
Silva, who confirmed midfielder Markus Henriksen will be out for up to three months after injuring a shoulder in the midweek EFL Cup defeat at Manchester United, said he wanted to strengthen his defence and add at least one winger to his squad.
"If you pay attention, our squad is playing one system at this moment," he added.
"We don't have real, natural wingers in our squad and we're trying to add them to it. "
Niasse had fallen out of favour at Everton under Ronald Koeman and had made just seven appearances since arriving on Merseyside from Lokomotiv Moscow in a £13.5million deal in February last year.
Evandro featured in 41 games in his first two seasons for Porto after signing for an undisclosed fee from Estoril in the summer of 2014, but made his sole appearance in the current campaign as a late substitute in the Champions League draw in Copenhagen in November.