Arsenal have made a £20m bid for Douglas Luiz, while Wolves accept Aston Villa's £13m bid for his potential replacement
Luiz - who joined Villa from Manchester City and is out of contract next summer - would like to play for a club in the Champions League.
Arsenal beat Aston Villa 2-1 on Wednesday night, but despite their perfect start of five wins from five, Arteta admitted he is wary about his strength in depth in the middle of the park following a spate of injuries and said Arsenal could do a deal on Deadline Day if the right player becomes available.
"We are looking at options," said Arteta. "Obviously [Elneny's injury] has an impact because Thomas Partey is injured and we are a bit short in that position. We do have Albert Sambi Lokonga and Granit Xhaka who can play there.
"We are just looking at options in the market. As I said, the club has been super supportive to try to keep improving the squad and the team as we can, and if the right player is available and we can do it, we will try."
Gerrard: I'm not in control of Douglas Luiz situation
Meanwhile, Aston Villa boss Steven Gerrard said his recruitment team were also working hard to deliver a Deadline Day boost - although he also discussed the potential exit of Luiz.
"I'm not in control of that," said Gerrard, when asked whether Luiz - who scored a sensational goal from a corner - would still be at the club at the end of Thursday. "There are more than two people in control of that but I'm certainly not one of them.
"That will be Douglas, that will be his agent's decision as to what happens around that. I'd like to keep him because he's a fantastic player. I've made that abundantly clear.
"We are not in a position where we need to lose our top players, but at the same time, Douglas has got a year to go, and it is one of those really touchy situations where the club have to do what is best for the club and not necessarily what's best for me."
On incomings, he said: "There's obviously very little time left, but people are working ever so hard in the background to try and get some support in where we feel like we need it. I don't think it makes sense for me to say where and how many, but we are working hard to try and make additions and for one or two to go the other way."
Villa now look like winning the race to sign Wolves' Dendoncker after they saw a £13m bid for the Belgium international accepted.
Wolves fielded approaches from Everton, West Ham and Aston Villa for the midfielder and are expected to try and sign a replacement.
How to follow Deadline Day on Sky Sports
Time is running out for clubs to do business in the transfer window. Here's all you need to know about Deadline Day and how to follow the drama with Sky Sports.
On TV, online and on the go: You won't miss a moment of the Deadline Day drama with Sky Sports.
Follow the latest transfer news and rumours in our dedicated Transfer Centre blog on the Sky Sports website and app - and make sure you bookmark our latest Done Deals page.
You'll be able to keep track of all the developments on Sky Sports News, as well as getting the best analysis and reaction from our studio guests and reporters at grounds across the country and in Europe.
Our Deadline Day programming starts at 7am and continues throughout the day on Sky Sports News, where you will be able to hear from Paul Merson, Clinton Morrison, Shay Given, Wes Morgan, Paul Robinson, Lianne Sanderson, Nigel de Jong and many more.
And to avoid missing out on any of the news wherever you are, look out for live streaming of Sky Sports News on the Sky Sports News YouTube page and on the Sky Sports app at 12pm and 8pm on Thursday.