16 May, 17:08
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Roncero played his last game on home turf as Stade edged to a 35-31 victory over Perpignan on the weekend but the Argentina legend is confident the club are on an upwards trajectory which will see them restored as one of the giants of European rugby.
"It's clear that we haven't been the best during the last two years," said Roncero.
"It's not the same Stade Français than in previous years but I'm very confident about the changes coming in.
"It will take some time, and perhaps it won't be next season, but I am certain that Stade Français will be challenging the big clubs again soon."
Roncero has seen all the highs and lows at Stade Jean Bouin and now Stade Charlety. He joined Stade in 2004 and played 126 games for the Top 14 outfit, winning a league title in the process in 2007.
And the loose-head prop will have one more shot at silverware before he retires, with an Amlin Challenge Cup semi-final with Top 14 rivals Toulon on Friday possibly paving the way to a Twickenham Stoop showdown with Biarritz Olympique or Brive on May 18.
Stade Francais were left heartbroken following a 19-18 loss to Harlequins in last year's final in Cardiff but they aim to go a step further this season, beginning with Friday's mouth-watering clash at the Stade Felix Mayol.