The 18-year-old produced a remarkable performance to defeat American No. 1 Jonah Serotta in an epic three-set final (5-6, 6-4, 6-5) at Seacourt Tennis Club in Hayling Island.

The final could hardly have been more dramatic, with the first set a sign of things to come.

Slipping 5-2 behind, Archie pulled back to level before his opponent eventually took the lead.

The second set followed a similarly topsy-turvy path, No. 5 seed Archie 4-2 up before Serotta cut the gap to 5-4, only for the Englishman to hit two outstanding volleys to repel the comeback.

The deciding set was equally dramatic. Archie raced into a 4-1 lead, but Serotta once again refused to surrender and produced some of his best tennis of the match to level at 4-4.

Archie moved ahead again at 5-4, only for Serotta to respond immediately and leave the players locked at 5-5, with both just one game away from the title.

With the championship finely balanced, the pair traded points in an enthralling final game.

At 30-30, an untimely double fault from Serotta handed Watson Championship Point.

What followed was an extraordinary rally in which both players had opportunities to claim victory before Archie produced an another stunning volley return winner and his maiden world title.

The final was the culmination of a week-long championship featuring the world’s top 16 junior players.

Claire Fahey, Head of Oratory Girls' Games and the current Ladies' Real Tennis and Ladies' Rackets World Champion, says, "I am delighted for Archie.

“He has worked incredibly hard on his game since he started playing Real Tennis at the school. He has showed real resilience and should be very proud of his performance."