Felix Auger-Aliassime celebrates. AFP via Getty Images It felt like the opportunity for Felix Auger-Aliassime to win a Grand Slam had come and gone, but things change quickly in tennis, and the Canadian could have his best opportunity in front of him at the French Open. The No. 4 seed at Roland Garros, Auger-Aliassime won’t have to deal with Jannik Sinner in a potential semifinal, and he wouldn’t stare down Alexander Zverev to the final. That’s the upshot. The downside is that the pressure on Auger-Aliassime is now at a new level, as he won’t want to fumble what is a golden opportunity to win a Grand Slam. The World No. 6 is a -310 favorite over American Brandon Nakashima for Saturday’s headliner. French Open: Auger-Aliassime vs. Nakashima picks This is an all-power matchup between two of the best servers on the planet. Nakashima currently ranks 13th on the ATP Tour in aces and is ninth in first serve point percentage, while Auger-Aliassime is ninth in aces and 11th in winning points on his first serve.…