Sporting Lisbon would easily get past the lose of Gyokeres it's not going to affect them much cause they're not a team that depends too much on a striker to win games moreover the huge fees recovered from the sale of Gyokeres is enough to get them two fast rising attackers then train them into becoming the new Gyokeres for the team.
In the last five years Sporting has won the Portuguese League, for the past two season Sporting won the league. This time around, based on my observation it won't be Sporting winning the next title. I want to give Benfica a good predicted season ahead, losing a striker and repairing without him in a squad is something that will affect them. You can't have a perfect goal scoring team without a striker, don't forget also that Gyokeres plays together with the team before advancing, him leaving is creating a deep space for someone else to fill, until they get someone compatible, there will be set backs in their performance.