London copper rose 0.9 percent on Friday, but remained on course for its biggest weekly loss since August 2010, fuelled by worries that runaway oil prices resulting from the turmoil in North Africa will constrain global growth. Shanghai's most active May copper contract rose 1.6 percent to 72,590 yuan. Nickel rallied 0.6 percent and at $27,675, is up 12 on the year, the second strongest performer of the year after tin.