Berlin police temporarily detained 63 people and has launched 50 criminal proceedings around fan violence at the start of the basketball Euroleague Final Four tournament in the German capital. Police said on Saturday that charges include serious breach of the peace and that officerts confiscated four balaclavas, two machetes, two irritant gas spray containers and a telescopic baton. Rival fans from Greek side Panathinaikos and Turkey’s Fenerbahce clashed outside the Berlin arena ahead of their team’s semi-final on Friday and a group of up to 80 tried to take advantage of the situation and ente…