The 26-year-old British wild card could not find a way past Mattia Bellucci, falling to the Italian 6-7(2) 6-3 6-4 6-4 to bring an abrupt end to his SW19 debut.
The 22-year-old is set to lock horns with Italy's Luciano Darderi on Wednesday, days after finally breaking through with a first-ever win in SW19 by taking down 20th seed Alexei Popyrin 6-4 6-1 4-6 6-4.
The 17-year-old was defeated by Raducanu 6-3 6-3 and admitted that the task of causing a first-round upset against the former US Open champion was a bridge too far.
Making only his second appearance in the main draw, the British wild card enjoyed a fine victory over Dusan Lajovic, defeating the world No.118 6-3 6-2 6-4 to clinch a maiden win in SW19 ...
Jack Draper is Britain's highest hope at Wimbledon this summer, with many tennis fans hoping that the star will follow in the footsteps of Andy Murray.