From TheChels.info - The Chelsea Football Club Wiki
Wallace Oliveira dos Santos, more commonly known as Wallace (born 1st May 1994 in Rio de Janeiro, Brazil), is a Brazilian Under-20 international right back who joined Chelsea from Fluminense in the summer of 2013. He is currently on loan at Gremio.
Wallace came through the youth team ranks at Fluminense and made his debut as a highly-rated 17 year-old in the 2011 season, having caught the eye considerably for Brazil's national youth teams.
On 4 December 2012 it was announced that Chelsea had agreed a deal to sign him for the start of the 2013-14 season, with an estimated fee of £4,500,000. Fluminense are also expected to get 40% of any fee Chelsea receive for Wallace in the future.
The player was to remain at Fluminense on loan until the end of the English 2012-13 season.
Wallace began his career as a Chelsea player in July 2013, joining the squad for the 2013 Asian Tour. Having impressed in pre-season, but with little chance of securing a work permit to play in England, he was loaned to Internazionale for the 2013-14 season in order to gain experience.  However, he struggled to make an impact, making just one start in the cup and three league substitute appearances.
He joined Vitesse Arnhem on loan for the 2014-15 season and was in and out of the team for much of the season, firstly losing his place at right-back to the home-grown defender Kevin Diks before eventually working his way back in late in the campaign as a right winger. His lively attacking displays in the closing weeks of the campaign helped Vitesse qualify for the Europa League.
A loan to Carpi for the first half of the 2015-16 season came to little and in January of that season he returned to Brazil to play for Gremio on an eighteen-month loan deal.
Wallace has represented Brazil at Under-17 and Under-20 levels.
Senior Club Football
|Season||Club||League||FA Cup||League Cup||Europe||Other||Total|
|2014-15||Vitesse Arnhem (loan)||22||1||1||0||0||0||0||0||0||0||23||1|
(Statistics accurate as of June 11th 2016)
- Campeonato Brasileiro Série A: 2012
- Campeonato Carioca: 2012
- Taça Guanabara: 2012
- Toulon Tournament: 2013
Wallace was reported by Brazilian media to have extended his Chelsea contract until the end of the 2018-19 season before moving to Gremio on loan.