Fiorentina suffered a 1-0 pre-season friendly defeat away to Sporting Lisbon thanks to VAR, but Nikola Kalinic came on as a substitute.
These clubs are twinned and a Viola supporter, Marco Ficini, was killed by a car driven by a Benfica fan when he was in Lisbon for a game in April.
Marco Sportiello was immediately called into action by Bruno Fernandes, whose effort was arrowing its way into the top corner, and again after Marcos Acuna skipped past Davide Astori.
Sporting took the lead on 28 minutes, but at first Bas Dost had been flagged offside, then the goal awarded after consulting the Video Assistant Referee.
Rui Patricio needed a decisive block on Ianis Hagi and Federico Chiesa turned the follow-up just over.
Jordan Veretout made his Viola debut in the second half, but Sportiello was again forced into a save on Podense.
Kalinic has been at the centre of numerous transfer rumours and came off the bench to play the final 22 minutes in Lisbon. He had the first Fiorentina shot on target of the game, 72 minutes in, but scuffed the finish.
Sporting 1-0 Fiorentina
Bas Dost 28 (S)
Sporting CP: Rui Patricio; Fabio Coentrao (Alan Ruiz 61), Bruno Fernandes (Adrien 61), Marcos Acuna (Bruno Cesar 61), William Carvalho, Battaglia (Palhinha 79), Podence, Bas Dost (Iuri 61), Fugueiredo, Gelson Martins (Doumbia 61), Piccini
Fiorentina: Sportiello; Bruno Gaspar (Milenkovic 68), Vitor Hugo (Tomovic 68), Astori, Maxi Olivera; Cristoforo (Veretout 46), Sanchez; Chiesa (Rebic 77), Hagi (Mati Fernandez 68), Zekhnini; Babacar (Kalinic 68)