The 21-year-old shone at the World Cup, featuring six times for Norway and scoring their opening goal in a last-32 win over Ivory Coast.
He was also introduced as a second-half substitute in Norway's dramatic 2-1 extra-time defeat by England in the quarter-finals, further raising his profile among Premier League scouts who have closely tracked his progress since his move to Germany two years ago in a deal worth around £18m from Belgian side Club Brugge.
RB Leipzig are holding firm on a £51m valuation for Nusa, who notched four goals and three assists in 31 Bundesliga appearances last season as the club finished third and qualified for the Champions League. Arsenal are approaching the situation strategically and are waiting to assess incoming offers for Gabriel Martinelli before making a formal move for the Norwegian, with the north London club keen to avoid overcommitting funds before their other squad business is finalised.
While the Gunners are not actively pushing to sell Martinelli, a bid exceeding £51m from Europe or Asia could be enough to convince them to let the 25-year-old Brazilian go.
Arsenal have already sold Leandro Trossard to Besiktas this summer and brought in Christos Tzolis from Club Brugge for £34m, as Mikel Arteta looks to freshen up his attacking options having missed out on top target Morgan Rogers, who instead joined Chelsea in a British-record £117m deal.
Tottenham are also firmly in the race for Nusa, though Roberto De Zerbi's side must first trim their squad before launching an official bid of their own, reports The Sun.
Nusa has developed into one of the Bundesliga's most exciting young talents since, with his contract running until 2029 giving the German club firm control over the timing of any potential sale, and no obligation to accept anything below their valuation this window.