Goalkeeper Ederson went under the surgeon's knife on Monday at the Hospital da Luz in Lisbon. Orthopaedic surgeon Dr António Martins performed the operation, a minimally invasive keyhole surgery to repair meniscus in the 22-year old's right knee.

Benfica have not revealed an expected return date, but it has been speculated that he will be absent for 4-6 weeks, ruling him out of the Supertaça against Braga, and possibly the first two matchdays of the new league season.

The surgery represents the second injury setback of the summer for the Brazilian goalkeeper. He was set to compete in the Copa América after receiving his first senior international call-up, but withdrew on the eve of the tournament with a muscle injury. Ederson was also omitted from Brazil's Olympic squad, although it is unclear if his fitness played a part in this decision.

Veteran Júlio César, who signed a two-year contract extension in May, should now start the season as Benfica's first choice goalkeeper. This will disappoint the majority of Benfiquistas, who were hopeful that Ederson would retain his place in Rui Vitória's starting eleven. According to our recent Twitter poll, 74% of the 292 Benfica fans that voted feel that Ederson is now Benfica's number one.

Júlio César recently resumed light training following a lengthy spell on the sidelines with a ruptured adductor tendon. Portuguese youth internatonal Bruno Varela has been sold to Vitória de Setúbal, so 38-year old Paulo Lopes will continue to provide cover for the ex-Inter Milan and Brazil stopper.