The England star, 22, also shrugged off question marks over the prestige of the competition ahead of Thursday's Group J clash with NK Maribor.
Walker said: "Some people aren't even on Channel Five on Thursday nights, so it is definitely something I want to win on a personal level and I am sure the lads and the gaffer want to do as well.
"No disrespect to them (opponents), but these are all winnable games.
"With the players we have in our team - we have world-class internationals - we can win this one, go to Lazio and give them a good game, and beat Panathinaikos and the table will look good come the end of it."
Spurs have failed to fire in the competition thus far - racking up three straight draws.