 Complete the following phrase:  Many national and international competitions are held in the city. Novi Sad played host to the European and World Championships in table tennis in 1981 and the 29th Chess Olympiad in 1990. It also welcomed the European and World Championships in sambo, the Balkan and European Championships in judo, the 1987 final match of the Saporta Cup in European basketball, and the final tournament of the European volleyball cup. Furthermore, Novi Sad co-hosted the 