The powerful front man was forced to play the final 10 minutes of extra-time in agony with a badly bruised ankle from a challenge with Liverpool midfielder Mohamed Sissoko.
Talking to the official site Marlon said, “I still can't believe how it all turned out. We should never have lost that game and picking up the injury that prevented me from taking a penalty made it even worse.
”I've had a scan on the ankle which has thankfully revealed just serious bone bruising, so I'll just be getting a bit of treatment on it and resting over the next week or so in order for it to heal.
“I could hear the fans singing my name as I was on the side of the pitch, but I just felt so frustrated and angry that I couldn't run properly or help the lads out.”
“We won't go away depressed because we've done really well, and I'm sure the lads will all be looking forward to coming back for pre-season training and trying to go one better next year.
”We know that next season is going to be much harder - teams will be more aware of us and the expectation levels will be higher, but we've got European football to look forward to and that is great for the boys. There is plenty to be positive about and we will be stronger after Saturday's experience.”