Piazon, 18, has been given the number 35 shirt by the West London club and having impressed in his limited exposure to the English game at Under-18 and Reserve level, Chelsea are ready to put their faith in the starlet.
The former-São Paulo player turned eighteen just last week and was immediately rewarded with an extended contract until the year 2017.
André Villas-Boas side will be looking for a morale-boosting win in South Wales, but must do so without star-men Didier Drogba, Frank Lampard and John Terry.
