XXVII Vis Moot - 2019/2020

27th Willem C. Vis International Commercial Arbitration Moot

The Willem C. Vis International Commercial Arbitration Moot is one of the most prestigious international moot court competitions for law students. Taking place annually in Vienna since 1994, it gathers up more than 2000 students, practitioners and academics with an objective of fostering the study of the international commercial law and arbitration.

For the 13th consecutive time, the University of Lausanne is presenting a team to the Vis Moot and will be represented this year by:

 Anaïs Essinger, Enzo Bastian, Claudio Colombi and Manon Schläpfer.

This year Jonas Zaugg will coach under the supervision of Professor Andrea Bonomi.

The team benefits as well from the support and guidance of

Sergii Drug, Professor Eva Lein, Professor Karen Druckman and John Curran.


The Problem of the XXVII Moot regards the complex issue of the validity of asymmetrical arbitration agreements as well as challenging a party-appointed expert under the LCIA arbitration rules. The problem also deals with the problematic of whether the suspicion of a defect in water turbines can constitute a defect in itself under the CISG and whether the buyer may be entitled to immediate replacement goods in such circumstances even when the seller has offered inspections and repairs.

The Moot problem can be accessed on the Moot website.

2020 Vis Moot Team Lausanne



Professor Andrea Bonomi has been in charge of the Vis Moot program at the University of Lausanne since its team participated in the Moot for the first time in 2008.  For more details on Professor Bonomi’s extensive experience and publications, please visit UNIL’s website.

Contact Professor Andrea Bonomi



Jonas Zaugg is a former Moot participant (2017-2018) and the coach of the UNIL team (since 2018). Mr Zaugg holds a Bachelor as well as a Master in Law from the University of Lausanne, specialising in commercial law and legal theory. Mr Zaugg is currently assistant to Professor Andrea Bonomi at the University of Lausanne and undertaking a doctoral thesis there under the direction of Professor Alain Papaux on the subject of philosophy of law and artificial intelligence. Alongside his studies, Mr Zaugg has worked in the field of health insurance claims against liable third parties for over five years. He is a native speaker of Swiss German, German and French, as well as a proficient English speaker. He is currently learning Italian and Arabic. In his leisure time, he enjoys acting in an amateur theatre troupe, learning about new technologies, cooking, travelling and working out.

Contact Jonas Zaugg

Team Members


Anaïs Essinger is a Master student at the University of Lausanne, specialising in commercial law and dispute resolution. In 2016, she obtained a Bachelor's degree from the University of Lausanne. Alongside her studies, Anaïs has been a ski instructor for the Swiss Ski School and, since the beginning of her Master, she is working as a jurist for the Junior Entreprise EPFL. Being a native French speaker, she is also fluent in English, with a good knowledge of German and basic Italian. In her spare time, Anaïs likes drawing and playing music. She also enjoys travelling and doing sports, such as skiing.


Enzo Bastian is a Master student at the University of Lausanne, specialising in commercial law and dispute resolution. Mr Bastian originally comes from France, but pursued all of his studies in Switzerland. Alongside his studies, Mr Bastian is currently working and is also in charge of a legal clinic in Lausanne. Being a native French speaker, he is also fluent in English and has good knowledge of German and Italian. In his free time, he likes playing tennis and cooking.


Claudio Colombi is a Master student at the University of Lausanne, specialising in international and comparative law. After he completed his high school studies in Physics and applied Mathematics, Claudio obtained a Bachelor’s degree in Law from the University of Lausanne, during which he did an exchange year at the University of Zurich. Alongside his studies, he has been an assistant to Professor Edgar Philippin at the Centre of Private Law of the University of Lausanne and is an official court interpreter in the French-speaking area. Coming from the Canton of Ticino, his mother tongue is Italian and he is fluent in French, English and German. In his spare time, Claudio enjoys sports and music. He competed at national level in decathlon, plays the guitar and, as a self-thought, the piano.


Manon Schläpfer is a Master student at the University of Lausanne specialising in international and comparative law. In 2017, Manon has obtained a bilingual Bachelor’s degree from the Universities of Zurich and Lausanne. She participated in the Swiss Moot Court 2019 and qualified for the oral pleadings in Lucerne. Shortly before the Vis Moot started, she was an intern at the ICRC in Geneva. Manon speaks fluent French, German and English, has basics in Spanish and is currently learning Russian. In her leisure time, she enjoys running, doing Pilates, playing the harp and learning about international relations and political science.


Sincere thanks are given to our sponsors
Walder Wyss