Oscar has developed into more of a balanced player than the one we saw in his days at Internacional. Promoted as the first-choice attacking midfielder over Mata by Jose Mourinho, the move paid dividends as Oscar was good going both ways.
While his early season form was excellent, his contributions to the team dried up towards the latter part of the 2013/14 season.
However, this turn of results could be fueled by the fact that Oscar has developed into a complete player in the No.10 role, unlike the pure-attacking player we knew earlier. Just as with Neymar, his natural flair makes him a highly useful player in the final third, Mourinho's demand for a high work-rate has converted him into a hard-working player who tracks back as well.
Gradually through the season, his position has come down to that of a third midfielder who can play the role of ball-carrier from midfield to attack. Brazil's two-man midfield which surely includes two defensive midfielders places high emphasis on Oscar's ability and therefore, his presence alongside them is required for their attack to function efficiently.
In the Confederations Cup, Oscar was given the license to roam forward and it would be the same this time as well. However, seeing as Neymar hardly tracks back, it would be important for Oscar to compensate and he has definitely grown into his role.
While tracking back isn't the most important part of Oscar's presence in the team, his creativity is. Brazil's lack of creativity from the midfield places the onus on Oscar to shoulder the responsibility entirely. The fact he would have three very good forwards around him makes the the most important cog in their Brazlian machine.
