The 18-year-old has already made 56 first-team appearances for Rennes since and including his debut in August 2022, chipping in with six goals and two assists.
Doue has not been regular starter, though, having begun just eight of his 22 outings for Rennes in all competitions this season, leading to speculation over a possible exit amid interest from a number of European clubs.
According to L'Equipe, both Newcastle and Dortmund are expected to submit offers for Doue before the January transfer window slams shut.
The Magpies are said to have held an interest in Doue since last summer, but they opted to pursue other targets in the previous transfer window.
Rennes' valuation of Doue is currently unknown, but the Ligue 1 club are under no immediate pressure to sell the attacker as he is under contract until June 2026.
Moving to Germany and Bundesliga leaders Bayer Leverkusen have reportedly stepped up their pursuit of Real Betis striker Borja Iglesias.
Xabi Alonso is currently having to cope without the presence of top scorer Victor Boniface, who is facing up to three months on the sidelines with a groin injury.
Iglesias has since emerged as a winter-window transfer target for Leverkusen, and journalist Fabrizio Romano claims that Die Werkself have made a formal approach to sign the Spaniard.
Romano adds that both Leverkusen and Betis have held talks over an initial loan deal with an option to buy, but the La Liga club are only interested in a permanent transfer at present.
Iglesias has spent his entire professional career in his native Spain, including the last four-and-a-half years with Real Betis for whom he has scored
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