The upturn in results has left Tottenham just two points adrift of a Champions League spot and Chiriches is eager to keep spirits high by securing three points against Crystal Palace on Saturday.
"It's very important to win and to keep winning," the Romanian told his club's official website.
"That will help us with our confidence. It does help to have a good run of games where you're picking up results.
"If you're strong mentally it's easier to win games. I think it's obviously very important to pick up another win, especially because it's a derby.
"A positive result will help us to go further up the table, which is obviously where we all want to be."