Lazio boss Stefano Pioli was delighted with victory over Sampdoria.
Santiago Gentiletti struck the only goal of the game.
"It's the right reward for a lad who has been very unlucky, suffered a great deal, but also worked hard to help the team in these closing weeks," Pioli told Sky Sport Italia.
"In football these situations can happen. This morning I decided to play him and it's destiny that it was all in the same stadium.
"Clearly this was a decisive game for us. The defeat to Inter could've left a psychological hangover, but the lads gave a great response of unity, solidity and desire to get the absolute most from this campaign."