Casares - Top-ranked Lee Westwood has threatened to close his Twitter account after becoming dismayed at the amount of abuse being directed at himself and fellow golfers on the social networking site.
Westwood says "idiots" are using Twitter for the wrong purpose, adding "it's social media, not social slagging."
Ian Poulter, who will play Westwood in the last 16 of the World Match Play Championship in Spain on Saturday, has been the target of heavy criticism on Twitter, while 1999 British Open champion Paul Lawrie has closed his account down.
Westwood said Friday that "it's just pathetic _ it's there to interact with people ... but some always take it too far and spoil it."