Inter Milan coach Simone Inzaghi was delighted with Lautaro Martinez after victory over Cagliari.
Lautaro struck twice for the 4-0 win.
Inzaghi said: “He just has to keep working like this.
"He scored in each of his last four games, he only missed Roma because he wasn't at 100 per cent. I am very satisfied with him and the whole team.
"Lautaro is our penalty taker, I can say as someone who missed a few myself, only those who are afraid to take penalties will never make a mistake."