The Spain international plundered a treble in Friday night's thrilling 4-3 Premier League victory at Newcastle to send the champions 13 points clear of arch-rivals Manchester United at the top of the table.
City still have two league games to play – Brighton away on Tuesday evening before a final day trip to Everton – but their ultimate focus is the Champions League final showdown with Chelsea on May 29.
Joelinton's penalty was his fourth league goal of the campaign, double his tally during his first season in England, and Newcastle head coach Steve Bruce believes there is much more to come from the £40-million signing.
He said: "He's coming to terms with the language, he's coming to terms with the Premier League, coming to terms with England. He's far better than what he was in trying to adjust to it.
"We know there's a player in there, that's for sure, but I'm delighted that he's got a few goals now and looked a threat. He's got to add that selfishness to his game and we've got a good player in there."