Deusser and Jasmien v Bisschop took over the rankings lead from Belgian Pieter Devos by finishing a fraction of a second ahead of Egypt's Nayel Nassar and Lucifer V.

Nassar put in an electrifying performance in a high-calibre jump off to clinch second place ahead of Swede Peder Fredricson and H&M All In.

An elated Deusser said the win had been special for several reasons.

"First of all my home crowd, second of all I had a big hope in that horse and that is her first big, big win and makes me really proud," said Deusser.

"I knew I had to take some risk and be really fast.

"It was very tight, but I am proud it worked."

While Deusser and grey mare Jasmien v Bisschop looked in form from the start, Devos with Claire Z had a frustrating day as he missed out on a place in the four-strong jump off after catching four faults to fall out of contention.

Devos, on 145 points, sits just 10 points behind Deusser after six events of the season though as Briton Ben Maher with Concona climbed up to third overall with 106 points.

German Deusser produced a clear round to reach the jump off despite being wide to the open water, while compatriot Jayne Meyer-Zimmermann and Karina Johannpeter of Brazil clocked up time penalties despite jumping clear.

A time penalty was also inflicted on Maher, who becomes the latest top rider to qualify for the Longines Global Champions Tour Super Grand Prix at the climactic Global Champions Prague Playoffs in November.

The four-way jump off was led by Sweden's Peder Fredricson, who stopped the clock at 49.98sec as he produced a clear round.

Deusser was next up and some sharp riding saw him cross the line in 45.95 for a big lead on Fredricson's time.

Fellow German Philipp Weishaupt with Che Fantastica knocked two rails down for eight faults, putting him out of contention as he rounded the course in 52.87.

Tension mounted as Egyptian Nassar whipped through the early part of the course, but he could not keep the pace and had to settle for second in 46.18.