Last week, the Swiss legend claimed the 99th individual title of his glorious career on home soil in the Swiss Indoors and declared afterwards: "The relief is great, it could be a turning point."
Basel was Federer's first win since the Stuttgart Open in mid-June, having lost in the final in Halle and Cincinnati, and disappointing defeats at Wimbledon and the US Open against Kevin Anderson and John Millman, as well as losing to Borna Coric in the Shanghai semi-final ,
The 37-year-old has decided to play in Paris for the first time in 2015, but a tough draw – and potential clashes with Rafael Nadal and Novak Djokovic – are in the way of a seminal 100th title.
But after a difficult time Federer feels confident and wants to continue his last improved form in the final in London next month.
Federer is six times winner of the season end, in which the eight best players of the tour compete.
He is the most successful player in the history of the tournament, although Djokovic only triumphs and the Serb will hope to catch up with Federer as he tries to end the year as No. 1 over Nadal.
Federer has not won the ATP final in any of the last six years, having lost three finals, but he hopes a win in Basel can trigger a strong end to the year in Paris and London.
He told the ATP World Tour: "Sometimes I did not have the best games, looking back on some of my losses at Wimbledon and maybe Cincinnati, as I lost it, I did not really like it.
"Also, the US Open was not easy to lose to Millman under these circumstances, is obviously not a good feeling.
"I was happy as the Laver Cup turned for me, and I also started playing better tennis in Shanghai. Therefore, I am happy that this could be a turning point.
"You need confidence, especially in London, if you want to beat the best players in the world, and I have not played with many top 10 players this year.
"I do not know why that is. If it's just the luck of the draw or I did not play enough to get to the boys, or maybe I got lost in one, I'd have won a few.
"It was a good season overall, so I'm happy to win again. This brings me a step closer to the 100 titles, which is a big goal of mine.
"At every tournament I play all my life, I always have the chance to reach 100, so I'm upset for every tournament.
"If it happens, it's great. If not, then not. I give the best chance I have. At every tournament I prepare the best possible way.
"It's always nice to win titles, that's the goal – that's why I'm still on tour. Sometimes it's less about the ranking than about reaching a semifinal of a tournament.
"To be honest, I preferred to win a tournament rather than the semi-finals of a major tournament.
"Especially at home tournaments where I like Basel have priority, which is a huge deal for me. Leaving a tournament without losing is a great feeling for any athlete I believe. "
Federer meets Milos Raonic today in his opening match at the Paris Masters.