Vickery is one of the elder statesmen of the Lions tour party
Wasps' Phil Vickery starts Wednesday's British and Irish Lions tour match against the Golden Lions determined to prove he is worth a Test place.
The 33-year-old former Gloucester prop has faced South Africa 10 times.
He told BBC Sport: "I'm fully aware that I won't come on a Lions tour as a player again. It's my last chance.
"I want to do everything I can to get in the Test team. The nerves and pressure are always there but that's why we do it."
Vickery says the squad will demand an improved performance when they play the second match of the tour against the Golden Lions, after a narrow win over a Royal XV on Saturday in an unimpressive opening display.
"Saturday was the first step on a very long ladder. Things are pretty serious now, and the pressure is on the midweek team to step up not just for the Lions but because places are at stake as well."