Arsenal must realize Sporting is not wanna selling Gyokeres to them following how complicated the conditions are. I only hope Arsenal to look at Jackson as Gyokeres's alternative caused by Chelsea is open in selling him. Let's imagine they have Madueke and Jackson in the same squad. That sounds good, right?
I agree with you, Arsenal should avoid wasting time pursuing just one uncertain player, considering that time is more valuable in finding alternatives with comparable talent.
Nicolas Jackson might be a better alternative if they fail to land Gyokeres.
The problem is, Manchester United is also eyeing the Chelsea striker.
If Arsenal were to make an offer to Jackson, I'm sure he'd choose Arsenal over Manchester United.