Pompey are currently at the bottom of the table after a poor start to the season.
Mokoena will return to former club Blackburn this weekend.
“We are too good to go down,” Mokoena told Sky Sports News. “You can see in all the games we have played, besides Arsenal, we had fantastic games and we created chances.
“That luck is starting to show now and hopefully we can really keep this momentum going.”
“It is going to be an exciting game for me, exciting for the team and with the position we are at and the position Blackburn are in, it’s going to be buzzing out there,” added Mokoena.
