The French defender says that he has fully settled into life at AC Milan and earned the praise of team-mate Urby Emaneulson for his efforts in Saturday's draw with Torino
The France international secured a loan away from Valencia - where he had fallen out with the club's hierarchy - in October with an option to buy at the end of the season but could not make his debut until January.
The 28-year-old now thinks that the best is yet to come from him, having adjusted to the differences between Spanish and Italian football.
"I am very happy for my first goal with AC Milan," he told reporters after the match. "It was a great feeling to score today. I have known Philippe Mexes for years and went straight to him after the goal.
"La Liga is completely different from Serie A but now I understand how Serie A works. I have to prove I am at the required level now."
Urby Emanuelson also enjoyed a standout performance against Torino and he praised goalscorer Rami and new Rossoneri coach Clarence Seedorf for the impact that they have made at San Siro.
"Rami is a special man and a good player who always jokes with us," the defender enthused. "He played a great game tonight and scored a fine goal.
"We're doing better in every game. I still have to learn more but I was happy with my performance.
"We have been with our new coach for two or three weeks now and are learning his way of playing. We must continue like this."