Marchetti hit the headlines on Saturday with a stunning performance to hold out Juventus in a 0-0 draw.
"So many people saw that point we earned in Turin as unimportant, but it wasn't for me. Being able to defend is a quality and we still have to improve, as the Coach tells us every day.
"I made three important saves against Juve, but I didn't see that many other clear scoring opportunities. We did less than usual in attack, but talking about catenaccio or being under siege seems a bit excessive.
"We are enjoying the Europa League and it is a competition many teams have their eye on," he said in a Press conference.
"We will try to win tomorrow in order to secure qualification, but it will be a battle. Tottenham are one of the strongest sides in the Europa League."