The 26-year-old Netherlands international, who can play as an attacking midfielder or as a striker, has yet to take the Premier League by storm.
De Jong joined Newcastle from Dutch giants Ajax in the summer of 2014 amid hype and expectations, but injuries and illness have impeded his progress at St. James’ Park.
The Dutchman has been getting some minutes this season, though, and he believes that he is getting stronger.
De Jong has featured in three Premier League games for the Magpies so far this campaign.
The Netherlands international has a pass accuracy of 73% and a shot accuracy of 100%, and has won one tackle.
Ahead of Newcastle’s Premier League clash against Watford at St. James’ Park on Saturday afternoon, De Jong has posted the following message on Twitter, to which the fans have responded.
@siemdejong the time feels right for you to start a game now. You're too good to be out our team any longer— Ross Lindsay (@RossLindsay21) September 18, 2015