Following speculation this week that Cardiff could change their manager for the second time this season – and rumours of a return for former boss Neil Warnock – Riza again insisted he could save the club from relegation to the third tier.
“If I didn’t think I was the right man for the job, I wouldn’t be standing here,” he added.
“It’s still only one point. Luton beat Derby which keeps us all close. If we approach the Oxford game the way we tried to approach this game, we feel we can get something out of it and take the points we need.
“Whether it’s one result, where it’s two results, whether it’s three, we just have to keep working and keep believing we are going to get the points that we need to survive.”
After hosting Oxford on Monday, Cardiff play their final home game of the season against West Bromwich Albion next weekend, before finishing the season at Norwich City.
Rubin Colwill is a doubt for what is left of the campaign, having been forced off with a hamstring injury only 13 minutes after coming off the bench against United.