The midfielder scored twice in Sunday’s 3-1 win over Everton became the Eagles’ all-time leading scorer of the campaign with six goals so far in the Premier League.
Gallagher moved to Selhurst Park in the summer on a season-long loan and will continue to maintain good form when Southampton travel on Wednesday.
“Conor has a passion for the game when he’s on the pitch like Ray Parlor, but I can say he can be capable of finishing the quality of a Frank Lampard,” said Vieira.
“It’s a coach’s dream to have a player like Conor because when he’s on the pitch he gives everything.
“He is focused, highly focused and will always give his best. This is something that for me is really important.”
This is the 21-year-old’s all-time best goalscoring season after he scored six times in the 2019-20 season, on loan at the Sky Bet Championship with Charlton and Swansea.
Vieira believes the midfielder’s desire to improve is behind his scoring performance.
“I think it is his determination to improve. Every time he sets foot on the pitch, he wants to improve and challenge himself,” added the Palace coach.
“We know his quality and we know he can be perfect. He can score goals but what really impresses him is his work ethic and training every day.
“When you have the determination to challenge yourself and improve, you have a better chance of succeeding.”
Gallagher, who made his England debut last month, went four games without scoring before scoring twice against Everton, while midfielder James McArthur picked up a hamstring injury.
Since McArthur’s absence, Vieira has tried a variety of combinations in the midfield and Will Hughes came in to good effect on Sunday.
In Hughes’ first game in seven months, the former Watford man impressed in midfield for the Eagles trio and earned praise from his manager after a fine debut. .
Vieira emphasized: “I think Will is more than that. The more he will play, the better he will be. This is a competitive position and this is a good thing.
“The competitiveness we have in midfield should bring out the best in each one, so that will be good for the whole team.
“I was and I’m really pleased with the game Will played and now it’s important for him to maintain that form and get even better.”
Vice-captain McArthur is still unavailable for the Saints visit but Joachim Andersen and Luka Milivojevic are set to return to the team.
Nathan Ferguson (Achilles) continued to strengthen his fitness for the match but Palace had no cases of Covid-19.
“We did the tests this morning and we are all fine,” Vieira said.
https://www.independent.co.uk/sport/football/conor-gallagher-patrick-vieira-frank-lampard-crystal-palace-selhurst-park-b1975836.html ‘Manager’s dream’ Conor Gallagher ends as Frank Lampard, Patrick Vieira claim