Viktor Gyokeres is expected in London on Friday after Arsenal corresponded to a £ 63.8 million deal with Sporting for the Striker.
The Gunners pay the Portuguese club a guaranteed reimbursement of £ 55.1 million (€ 63.5 million), plus £ 8.7 million (€ 10 million) in add-ons.
Sky Sports News understands that Gyokeres will be released in London on Friday to sort the last contractual details with Arsenal.
It is thought that the plan is for him to join the team in Singapore and to complete his transfer of sport.
Bringing in a striker is a primary focus for Arsenal in this transfer window – they have investigated conditions for a number of players, including RB Leipzig's Benjamin Sesko.
Sky Sports News reported in June that Gyokeres was a target of Manchester United after they had achieved a first approach for him through intermediaries.
Last month, sporting president Frederico Varandas, who would not be allowed to leave Gyokeres this summer for less than £ 59 million (€ 70 million) after combating the existence of a 'men's agreement' with the agent of the Swede that would allow him for a fixed fee of £ 50.8 million (€ 60 m), plus £ 8.4 m (€ 10).
After he arrived at Sporting from Coventry City for around £ 20 million in 2023, Gyokeres scored an incredible 97 goals in just 102 games during his two seasons in the Portuguese capital.
Gyokees scored 54 goals in just 52 games in all the last campaign, including a hat trick against Manchester City in the Champions League, while helping winning the competition and the Portuguese Cup.
Gyokeres sees a move to Arsenal to English football, after he joined Brighton & Hove Albion in January 2018, before moving to Coventry after Leen Proverbs in St Pauli and Swansea City.
Gyokeres scored 43 goals for Coventry in his two and a half seasons with the championship side.
Gyokees part of the busy summer in Arsenal
Developments around Gyokeres are amid a busy summer of income in Arsenal.
They announced the signing of midfielder Martin Zubimendi van Real Sociedad in a £ 51 million deal and another central midfielder, Christian Norgaard, arrived from Brentford for £ 15 million.
Spaniard Kepa Arrizabalaga was signed for £ 5 million from Chelsea, followed by a £ 52 million deal for Noni Madueke.
And Arsenal have been set to confirm the signing of Valencia defender Crithian Mosquera in an initial £ 13 million deal.