Enzo Fernandez could be in the Chelsea squad for their Premier League clash with Fulham on Friday night after completing his English-record transfer late on deadline day.
The Argentine joins the Blues for a fee of £106.8m, and with some injury worries in midfield, there is the slight chance he may be thrown straight into the side.
He has already played five times for Benfica since winning the World Cup with La Albiceleste in mid-December, so sharpness and match fitness will not be an issue for the new man.
With N'Golo Kante and Denis Zakaria both out in that central midfield position, it leaves Graham Potter's options bare in that position.
Mateo Kovacic should return from a slight calf injury that saw him miss their last match away to Liverpool, but Jorginho, who started in that trip to Anfield, has since moved to London rivals Arsenal.
Joao Felix will serve the last game of his three-match ban following his red card at Craven Cottage in the reverse fixture, opening the door for Mykhailo Mudryk to potentially make a first start for the club.
The Ukrainian looked lively in his debut off the bench against Liverpool, and with Raheem Sterling and Christian Pulisic both out injured, a start looks likely.
Hakim Ziyech and Conor Gallagher also both started in their last outing, but the duo failed to complete late moves away from the club in the January window, so their Chelsea careers will now come under serious doubt for the foreseeable future.
Kepa Arrizabalaga will continue in goal with Edouard Mendy still absent, and Benoit Badiashile should start in the back three in front of him, having kept two clean sheets in his two appearances since joining from Monaco.
Full-back pairing Reece James and Ben Chilwell are both back in training, but Potter is yet to put a specific timeframe on when they could return to the starting lineup.
Armando Broja is Chelsea's other injury absentee, with the Albanian out for the season after rupturing his ACL during the World Cup break.
Chelsea possible starting lineup:
Arrizabalaga; Chalobah, Thiago Silva, Badiashile; Azpilicueta, Kovacic, Hall, Cucurella; Mount, Mudryk, Havertz
Andrew Delaney
