The 27-year-old chalked up nine goals and six assists in 25 appearances prior to the season being curtailed by the coronavirus pandemic in March.
Unsurprisingly given his form this season, Benfica are believed to be holding out for £71.3m, though that may change in the first transfer window since the spread of COVID-19.
Despite interest from a host of other clubs, including Newcastle United, Leicester City and Wolverhampton Wanderers, the Gunners are said to be leading the chase for his signature.
With that in mind, Sports Mole looks at the shirt numbers available to Silva should he make the switch to the Emirates Stadium.
Silva joined Benfica in 2016 and has worn the number 27 shirt in all four seasons since.
The Portugal international previously played with '18' on his back at Braga and '26' in his early days with Feirense.
At international level, meanwhile, the Feirense youth product has worn a few different numbers, most recently 15, which is held by Ainsley Maitland-Niles.
In terms of other possible options for the Portuguese attacker, he may be tempted to go for the seven shirt should he move to North London, freed up by Henrikh Mkhitaryan's exit.