If the Reds can beat Arsenal at the Emirates this weekend it will be a huge boost to their title credentials says Riera.
"We've beaten United and Chelsea already this season so if we could now beat Arsenal maybe it would send a message out," said the winger.
"It would be a good response to go and win against Arsenal after these draws.
"If we do that some might say we're doing it the hard way - beating the top teams and not those we might be expected to win against - but people forget this is a very competitive championship.
"We're still in a good position."