Luis Enrique faces a return to the Stadio Olimpico as Barcelona begin their Champions League defence against Roma on Wednesday.
The former Spain international was in charge of Roma for the 2011-12 season but left the club after failing to guide them into European competition.
"What happened at Roma made me a better coach," he said. "I have great memories, I'd have liked to have finished higher but it was a very positive year."
The game also represents another milestone in the career of Lionel Messi, with the Champions League's all-time top scorer set to make his 100th appearance in the competition.
"I think we played well," he told the club's official website.
"It wasn't a stellar performance like the Juve match [a 2-1 win before the international break] but the most important thing was to get the three points. Now we can focus on Barcelona.
"It's going to be a massive match, for the team and for all Roma fans. I'm sure that with the support of the fans we can achieve something big.
"We're all very young and I'm sure that with time the understanding and communication will get even better."
The European champions overcame Roma 3-0 in the Joan Gamper Trophy exhibition match in August but they have not met in the Champions League since February 2002, when Luis Enrique started in Barca's midfield in a 1-1 draw.
