A shock to the system maybe but hardly a hurtful knockdown and he saw the round out easily, besides it happens. If he's sparred with the guy and held his own and I've heard nothing to counter that claim, then he has every chance of being competitive against Rigo or anybody, that's if his abilities translate up to world level. Rigo has done wonderfully to be a world titlist after only 9 fights but how many amateur fights has he had? Plus he isn't getting any younger despite his fledgling pro career so it's hard to imagine his stay at the top lasting for that long.
He has like 247 Amateur fights and won something like 243.
Honestly mate Quigg- Rigondeaux would not be competitive at all Rigondeaux knows every move in the book and is super talented.