On Saturday, Vegas Golden Knights goalie Marc-Andre Fleury's agent Allan Walsh tweeted a graphic image of artwork depicting Fleury getting stabbed in the back by a sword with "DeBoer" written on it.
The image seems to suggest Walsh's disapproval of Lehner appearing to take over the starting job for Vegas — whose head coach is Peter DeBoer — in the 2020 Stanley Cup Playoffs.
The Golden Knights begin their second round series of the playoffs against the Vancouver Canucks on Sunday.
Lehner made 23 saves in Tuesday's Game 5 of the first round series against the Blackhawks, helping the Golden Knights win the contest 4-3 and eliminate the Hawks from the postseason with a 4-1 series victory.
The 29-year-old goalie signed a one-year free-agent contract with Chicago last summer. He was later traded from the Blackhawks to the Golden Knights ahead of Feb. 24's trade deadline.
Related: Why Robin Lehner was 'all about love' for Blackhawks after first round series Lehner is 5-1-0 with a 2.44 goals-against average and a .904 save percentage in this year's postseason tournament.
Fleury, a three-time Stanley Cup champion with the Pittsburgh Penguins, is 2-0-0 with a 2.50 goals-against average and a .886 save percentage in two 2020 postseason games: a round-robin contest against the St. Louis Blues (6-4 win) and Game 3 against the Blackhawks (2-1 win).