June 17 (Reuters) - Sports news in brief from around the world:
Volleyball - World volleyball's governing body FIVB voted on Tuesday to introduce controversial quotas on foreign players in club competitions.
Spokesman Fabrizio Rossini said the proposals, approved by the organisation's executive committee last month, had been accepted by the FIVB Congress in Dubai.
Similar to the "6+5" proposals being championed for soccer by FIFA president Sepp Blatter, volleyball's own quota system will ensure that at least half the six players on court are eligible to play for the country where their club is based.
Soccer - Liverpool have given AS Roma the green light to talk to Norway defender John Arne Riise about a possible move but media reports that the deal is done are "premature", the Serie A club said in a statement.
Cycling - Italian Ruggero Marzoli has been banned for six months for frequenting Carlo Santuccione, a doctor who is alleged to have supplied athletes with banned substances, the Italian Olympic Committee said on its Web site (www.coni.it).
Marzoli quit the Tinkoff Credit Systems team last year after being charged with involvement in the case.
editing by Justin Palmer