Anthony Joshua has vowed to deliver a knockout win over Francis Ngannou and “make a statement” in their super-fight in Saudi Arabia on Friday. Joshua is currently on a three-fight winning streak and building back towards being in world title contention. Last December, it took the British boxer five rounds to despatch Otto Wallin in a dominant display. AJ is however expecting a different test against Ngannou in their non-title contest. “I believe I can knock him out. Definitely. I would love to knock him out and make a statement. “Physically I feel strong, feeling good. Strong enough to get the…