Big-spending Toulouse had been heavily linked with the 25-year-old Roberts however the Blues centre has insisted otherwise.
With a medical degree at Cardiff University to finish the 41-cap Wales international took to the social network to declare his future lies in the capital.
Toulouse are apparently ready to spend £200,000 to buy out the last year of the inside-centre's contract but Roberts said: "Rumours in the press this morning about a move to France...I'm certainly a Cardiff Blue next season and will hopefully graduate as a doctor!"
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