Complex sentence: The world's first open tournament was held in the English town of Guildford in 1898, the success of which paved the way for the All England's inaugural edition, which was held at London's Horticultural Halls in 1899.
Split into simpler sentences: The world's first open tournament was held at England's Guildford town in 1898. And success of that tournament paved the way for the All England's inaugural edition, which was held at London's Horticultural Halls in 1899.