Sunderland boss Roy Keane faces an anxious wait as he attempts to assemble a forward line for the new season. The Irishman relied heavily on STG£6 million signing Kenwyne Jones last season, and has been conscious of the need to provide him with support for some time. However, his recruitment mission is being complicated by the 23-year-old Trinidad and Tobago international's knee injury, which has been the subject of intense speculation in recent days. Sunderland revealed last week that the full extent of the damage to his medial ligament is not yet clear despite two scans, and that a further assessment would be made after "several weeks of conservative treatment". Reports over the weekend suggested that Jones, who was hurt just minutes into his country's friendly clash with England earlier this month, has been booked in for surgery later this week and may not play again this calendar year.