The young front man completed the full 90 minutes in Monaco on Thursday night as we drew 1-1 in our first Europa League away trip of the season.
With attentions now turning towards Sunday's match at the Liberty Stadium, Harry insists the lads are confident of taking maximum points from the Swans and are riding the crest of a wave after Premier League victories against Sunderland, Crystal Palace and Manchester City in recent weeks.
"It’s going to be a tough game – they’re a very good side and they play good football, but we’re on good form and we’re playing well," said the England international.
"At the moment we’re full of confidence coming off the back of a 4-1 win against City in our last league game.
"We’ll go there, look to play our brand of football and keep our energy levels high to get the three points."
We were singing in the rain on our last trip to Swansea back in December, 2014, with Harry and Christian Eriksen on target on a wet afternoon in south Wales to give us a 2-1 victory.
Naturally, Harry is eyeing a repeat of that result, although he knows we'll have to work hard if we're to achieve that against a talented Swansea side.
"We’ve got good memories of Swansea from the game there last year but it was still a very tough game," he added.
"We’re focused on what we need to do so we’ll go there, take the game to them and hopefully go into the international break off the back of a win."