The Celtic midfielder put in a tireless shift in Italy tonight.
Neil Lennon's men produced an excellent display to match the Serie A side blow for blow throughout a compelling 90 minutes, before delivering a win right at the death.
Initially looking ropey and conceding early in the match, the Scottish champions grew into the game backed by a vociferous away support.
James Forrest's first-half goal changed the game. From that point on the Hoops had multiple chances to win the match but had to wait until stoppage time, when Olivier Ntcham popped up with a stunning last-minute effort.
It's a victory that sees them progress to the last 32 of the competition, with two games to spare.
Christie was one of the busiest players on the pitch. Both defending robustly and giving the Hoops an outlet on the counter-attack, he was a big presence before being substituted off.
The 24-year-old has scored an excellent 12 goals in 22 appearances for the Scottish champions this season, also creating seven assists.
He may not have weighed in with that kind of contribution tonight, but his on and off the ball performance was no less important.
His rise over the last 12 or so months has been remarkable and he'll be aiming to show off his skills in the final two group matches of Celtic's Europa League campaign, with knockout football to follow.
These fans were certainly impressed with his display tonight, taking to Twitter to share their thoughts...
Ryan Christie once again showing here how he is head and shoulders above any other player in our team. He's a sensation.— Tunes (@sscfctunes) November 7, 2019
Ryan Christie is just everywhere in every game— Graham Murphy (@grahamMurphs) November 7, 2019
What a player Ryan Christie is most of his work is off the ball magnif— Daniel Fagan (@Fagan1888) November 7, 2019
Fact of the matter is Ryan Christie is the best player to grace this fine planet of ours— geordie (@georgesewell98) November 7, 2019
How good is Ryan Christie btw— scott McIntyre (@scottMc85081322) November 7, 2019
Energy and ability Christie brings is superb man whatta player— Daz hall (@dazhall91) November 7, 2019
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