Jansen suffers a further setback Blackburn striker Matt Jansen faces three weeks out after surgery to treat a cartilage problem. But central defender Lorenzo Amoruso is moving closer to fitness following a knee operation. Rovers' assistant manager Mark Bowen said: "Matt had a small operation to trim knee cartilage. "It's a tiny piece of work, which should be a fairly quick recovery. Lorenzo is also jogging for the first time, along with kicking a ball." Jansen's career has been dogged by injury since a freak scooter accident two years ago. He returned to first-team action soon after Mark Hughes' appointment as Blackburn boss and marked it with a goal against Portsmouth in his first appearance of the season. Bowen added: "I'm guessing, but I reckon maybe two to three weeks before he is back in action completely." The Rovers assistant boss forecast a longer time spell for Amoruso's availability for first-team duties. Bowen said: "There's still some scar tissue present so it will be some weeks. "It's a case of see how he goes. You can't put a real time on a comeback, we'll see how he progresses."