Richie's try was one of the few bright spots for the Scots as they went down 32-14 to Ireland at the Aviva Stadium.
Scotland have now lost all four of their games in the Six Nations, as decent displays against England, Wales and France have also gone unrewarded for head coach Andy Robinson and his side as they continue to make basic errors at crucial moments.
Richie said: "We're massively disappointed and we know we move into next week with a lot of pressure on us. It's a huge game coming up.
"In three out of four games we've performed really well in this championship, so it's not a case of going back to the drawing board, it's sticking to what we've been doing and trying to scratch out a performance in Rome."