Lacoste's parent company, Maus Freres, also owns Technifibre.
https://maus.ch/en/landmark-brands/
So if he were to get dropped by both Lacoste and Head, you may as well rule out Technifibre as a possible suitor.
Here's some lists of his current sponsors :
Who Are Novak Djokovic’s Sponsors? Who Are The Brands Sticking With Him Despite The Controversies Novak Djokovic, who has won 24 grand slam titles, is considered one of the greatest tennis players. During 2015-2016, Djokovic won all four grand slams back to back (though not in the same calendar...
tennisfansite.com
The number-one ranked men’s singles champion works with a multitude of global brands.
wwd.com
Head
Asics
Lacoste
Hublot
Jacob's Creek
ANZ Bank
UKG
Lemero
Montblanc
NetJets
Peugeot
Seems like many French, Swiss and Australian brands there.
UKG is dealing with a massive ransomware attack (
https://thestack.technology/kronos-ransomware-attack-ukg-kronos-private-cloud/) and will lose a ton of clients and income stream soon, among lawsuits as well.
Not many sportwear brands here other than New Balance
https://www.netaxpayers.org/wp-content/uploads/2020/09/consum5.2.pdf