Our Spanish international marksman kept his composure to slot the ball into the net with just 10 minutes left to play after Ahmed Elmohamady was adjudged to have handled the ball in the area.
It proved the only goal of the game on a blustery afternoon at the Lane and marked the third time Roberto has netted a decisive penalty in the Premier League this term, having also scored from the spot to seal our early-season wins against Crystal Palace and Swansea City.
It was also a second goal in the space of a week for the 28-year-old after he found the net in our 2-0 win at Aston Villa seven days ago.
“The only thing you think about in your head is just to score,” said a delighted Roberto after Sunday’s game. “That’s all you think, just put it in the back of the net.
“For a striker it’s really important to obviously score, and I took that positive of scoring last week at Villa into this game, and obviously I turned it into a positive again at the end of the game.”
Our victory lifted us into fourth place in the table – three points off the top – and Roberto felt the result was vitally important to our continued bid to make an impact in the upper reaches of the Premier League.
“We’re doing very well at the moment,” added the striker. “We had to keep up with the teams that had won yesterday, and today Chelsea won as well, so we had to keep up with them.
“Apart from the blip against West Ham I think we’ve done very well at the back recently to not have any goals scored against us and I think we’ve done well, we’ve won our game and we’re moving forward.”
Roberto was also pleased with the way he linked up with fellow front man Jermain Defoe upon the latter’s introduction off the bench as a second striker in the final 20 minutes.
And Roberto explained that he had to adapt his positioning when Andros Townsend temporarily left the action after clattering over the advertising hoardings shortly after we took the lead.
“The Andros injury did affect (my game towards the end) as I had to then play deeper and leave JD playing higher up the pitch,” he added.
“But we played well together, because we’re both used to playing with top internationals.”