But it was Son, who was on fire whenever he received the ball, who got the opener - and what an opener it was.
Tottenham could have had an early second half penalty when Son went down in the box under Terence Kongolo's challenge, but Kevin Friend waved away the appeals.
Jones' mobility was limited as he sat on a chair on the sidelines, from where he was instead the fourth official, and an announcement went over the Wembley tannoy requesting qualified referees, before another followed insisting the "situation was in hand".
Huddersfield's chances of defeating Tottenham for the first time since 1956 were dealt a blow when Dele Alli sent Son racing clear of the defense to round goalkeeper Jonas Lossl for the opening goal in the 27th minute.
Jan's three games were all key to our ongoing pursuit of a top four place and progress in the Champions League, as he played at Anfield, in the home win against Arsenal, and also in Turin. It is cultural. Maybe in February it is going to happen.
Spurs continued to press for a second and two Dier crosses caused the Terriers problems on the stroke of half time, but they managed to survive.
The breakthrough came just before halftime. "For sure Saturday will be the best support we have ever had, because everybody is fighting to survive, the supporters as well, and we will prepare as well as we can". Undoubtedly Pochettino's men will be frustrated that they didn't add to their advantage.More news: White House Denies Report McMaster Will Soon Be Ousted
Son was replaced to a standing ovation with 20 minutes to play as Spurs took their foot off the accelerator pedal.
Tottenham were nearly made to pay for that missed chance when Ince was played in on goal in the 53rd minute, but Lloris parried his 20-yard effort and it remained 1-0. The Lilywhites fought out a commendable 2-2 away draw, and now enter the second leg at Wembley with an advantage on away goals.
Son has often been the difference-maker against lesser teams at Wembley, scoring here against Everton, West Ham, Southampton, Brighton and Stoke since December, and it was no surprise when he gave Spurs a deserved lead.
The hosts thought they had made it 3-0 with 58 on the clock when Eriksen's free kick was headed home by Vertonghen, but Huddersfield had perfected the offside trap and it was correctly ruled out.
While the rest of the Spurs team picks itself for Wednesday's Champions League match against Juventus, the South Korean is vying for one spot with Erik Lamela, and his inclusion hinted that Pochettino would opt for Lamela against Juve - just as he did in Turin.
Spurs almost made it three with 11 minutes left, but Kane fired wide after Eriksen had picked him out perfectly from a corner.