Andries Pretorius is determined to stake a claim for a regular place in the Wales line-up when they take on Japan on Saturday.
The Cardiff Blues back-row is expected to start in Tokyo, and he is hoping to challenge British and Irish Lions pair Toby Faletau and Dan Lydiate for starts in the autumn internationals.
Pretorius, who can play No 8 or blindside flanker, impressed on his international debut last week as a second-half replacement in the 22-18 win in Osaka.
The 27-year-old said: "It was a very special moment to come on and win my first cap, especially having so many of my club team-mates around me to share it with.
"But my first cap is only the start. I've worked very hard to get here but now the really hard work starts.
"For me it is now all about developing and staying in this squad when the British Lions boys are back.
"If I can put as much pressure as possible on Toby Faletau and Dan Lydiate for their places then my job is done because it's all about what is best for this team."
Pretorius revealed that Cardiff team-mate and Lions captain Sam Warburton sent him a good luck message ahead of last week's first Test.
"It just shows what a gentleman Sam is to be thinking of his team-mates in Japan, given everything he has got going on in Australia," he added.
"It has been a wonderful experience already being part of the squad and playing out here in Japan.
"We know we have to improve a few areas of the game from last week but I thought the young guys showed real character to dig out a win last week."