The Saints have impressed at the start of the season by reaching third place in the table after 11 games.
"Mauricio's thoughts are exactly the same as ours," the Daily Echo quotes Ward-Prowse as saying.
"We get more confident day by day and we believe we can reach the top, it is just a case of putting in the hard work off the pitch and on it. I am sure we can hit the sky."
The former Championship outfit will take on Arsenal at the Emirates after the international break.