Everton manager David Moyes said taking on Liverpool had always been a difficult task for him, but he was aware that the defending champions have some vulnerabilities ahead of Saturday's Merseyside derby in the Premier League. Moyes, who has won only six of the 44 matches he has faced against Liverpool in his managerial career, said the visit to Anfield would help gauge Everton's quality after his team picked up seven points in their first four league matches. "As much as Liverpool have shown at different times where they have been very good ... other times they have shown some vulnerability when they have conceded goals," Moyes told reporters on Friday. "We will have to try and take advantage of...