Welshpool boxing fans were set to take Walsall by storm tomorrow night (Saturday) for Sinden's return to the ring for his fifth pro fight.
A coach load of supporters were due to back the town's boxing hope and many others were making the trip to the Midlands to see the bout.
But an emotional Sinden has just broadcast a recording to his Facebook followers announcing that the fight has been cancelled following a problem with his medical.
Sinden explained that a revalation about a fainting incident when he was a schoolboy had triggered the cancellation. He encouraged ticket holders to immediately contact their sellers for a refund.
.