[4][5] He played his first match in a 2–2 friendly draw to Rangers, but failed to make an impact due to leg injuries, his Serie A input consisting of two minutes in a 2–0 away victory over Calcio Catania on 3 May.
[8] During the season he battled for first-choice status with Josemi,[9] scoring from 40 meters in a 4–1 home win against Atlético Madrid[10] as the Balearic Islands team eventually finished fifth and qualified to the UEFA Europa League (later revoked).
[12] Early into his spell in Catalonia, Mattioni sustained a severe knee injury – left anterior cruciate ligament – going on to miss the entire 2010–11 campaign.
[14][15][16] Mattioni finally returned to action on 1 November 2012, appearing as a late substitute in a 1–3 away loss against Sevilla FC for the round of 32 in the Copa del Rey.
[24][25] The following April he agreed to a deal at Esporte Clube Juventude of the second division,[26] scoring in a 1–1 away draw against Grêmio Esportivo Brasil[27] as the campaign ended in relegation.