The fit-again South Korea international midfielder said: "I want to win all of the titles.
"Last season we won the league but reached the semi-final of the Champions League and the final of the FA Cup. This season we have a better squad.
"Compared to last season, we have more players and the new signings have done very well so far. We have a lot of quality players.
"There are more matches this season, so we need a good enough squad - but I know we have it."