Marin impressed in the comfortable victory.
"I felt good today and I think it was okay for my first match," the midfielder told chelseafc.com.
"Of course it was a nice feeling to score in the first game and to have an assist too, and I am happy with my performance. And playing here was not like in Europe. It was another atmosphere when we came out with the firework explosions, and it was a really nice feeling to play in this stadium."