Both players are still teenagers and are seen as stars of the future by their respective clubs - and it is believed that they could definitely make the grade at Spurs.
Zukic, 19, has had an impressive season in Serbia, scoring six times in 28 games in all competitions for Vojvodina.
Meanwhile, Ngakia, also 19, has had a breakthrough season with Spurs' rivals West Ham - making four appearances in the Premier League in 2020.
Spurs previously were believed to not be interested in signing players permanently for transfer fees, but with Ngakia's contract expiring at the end of the month and Zukic's club not likely demanding an extortionate fee, both transfers seem plausible.
Ngakia in demand
According to West Ham journalist and podcaster 'ExWHUemployee', Ngakia is a target for Spurs as well as fellow London club Crystal Palace, having turned down the opportunity to sign a new deal with his contract expiring at the end of the month.
In addition, the Telegraph and Football London have both reported that the teenager is currently considering a move to Germany, following in the footsteps of fellow former Hammers wonderkid Reece Oxford.
A move to Germany is now a very attractive option to any young prospect in England - with their willingness to play young players and develop being a persuasive factor.
But Ngakia moving to Spurs would make a lot of sense in the grand scheme of things - the North London club also have a proven track record of giving young players a chance in the first team; having a preference to develop young English talents.
Furthermore, Mourinho is said to be in the market for a right-back, as Serge Aurier's defensive weaknesses leaving the back-line vulnerable and continuous behavioural problems leaving the club in fury at the player.
Ngakia already has Premier League experience, and has impressed West Ham fans in the games he has played in, so there is no reason why if given the chance, the starlet could make the grade at Spurs - should he choose North London over Germany.
Serbia's newest creative force
Hailing from Bački Jarak in Serbia, Zukic has drawn plenty of comparisons to the likes of Sergej Milinkovic-Savic due to his creative decision-making during games.
After 38 professional appearances, the attack-minded midfielder has scored five goals and four assists - an impressive return for a 19-year-old youth academy graduate.
Furthermore, the starlet has made his mark for Serbia at youth level, scoring once in five games for Serbia's U19 side.
There is also interest from overseas too, with the likes of Inter Milan and Olympiacos reportedly enquiring in Zukic.
The Serbian is valued at around £500K by Transfermarkt, but is likely going to have a higher price tag should clubs make genuine offers - but it is unlikely that Vojvodina's valuation is going to be drastically higher than Spurs' valuation.
Should Zukic make the move to Spurs, it is unlikely he will be fast-tracked straight into the first-team and a loan move to the Championship could be one option for the starlet's development - with Spurs having a close relationship with the likes of Queens Park Rangers and Charlton Athletic as well as Luton Town in recent years.
Zukic would have the likes of former Leeds United star Jack Clarke, young winger Dilan Markanday and scorer of the first ever goal at the new Tottenham Hotspur Stadium (in a Tottenham U18 game) J'Neil Bennett to compete with in order to breakthrough to the first team.