Juan Cuadrado’s rare header proved enough for Juventus to grab all three points and end Sampdoria’s positive run, but Paulo Dybala went off injured.
The Colombian doesn’t often get to nod in a goal, but he did at Marassi after just seven minutes on Kwadwo Asamoah’s cross.
Although the Blucerchiati staged a fightback in the second half and Dybala limped off with a muscular problem, Juve held on for the victory.
Max Allegri was visibly furious on the touchline, as he saw his team cling on to the slender lead.
Or see how all today’s Serie A games unfolded on the Liveblog.
Tickets for the Champions League final between Juventus and Real Madrid are still on sale with reseller Viagogo - Click to find out more