The 28-year-old Argentine has scored three goals in his first two starts for the Blucerchiati.
"Step-by-step we can reach our goals," Lopez told Sky Sports.
"But we have to continue to focus. The team wants to do well. I personally feel good. I want to thank everyone for the welcome I have received - the team, the staff, the board and the fans. I hope to continue on this path.
"I want to score as many goals as I possibly can, and I want Sampdoria to reach its targets."