Stoke City manager Paul Lambert criticised the decision to award Cenk Tosun's contentious opening goal in Everton's 2-1 win at the bet365 Stadium on Saturday.
Tosun looked to be in an offside position as he initially attempted to head home Yannick Bolasie's cross in the 69th minute, before burying the loose ball amid a subsequent goalmouth scramble.
Stoke, who had Charlie Adam sent off on the half hour, quickly equalised through Eric Maxim Choupo-Moting, yet parity only lasted seven minutes as Tosun returned to net the winner and heap more pressure on a home side stuck in the Premier League relegation zone with only seven games to play.
Lambert said he understood referee Martin Atkinson's decision to dismiss Adam, but the Potters boss was upset by the manner in which his team's dogged rearguard came undone.
"I thought the first goal was offside. Well it is offside because I have seen it," Lambert told the club's video channel.
"The thing that disappoints me most is that it is the linesman's side. He is looking right across the line. How he has not seen that is disappointing.
"The response with 10 men to going a goal behind was fantastic. I thought we were well in the game, but the first goal is offside.
"He has got to call that right. You cannot get that wrong. It gave Everton something to hang on to."
Conversely, Everton boss Sam Allardyce praised Turkey international Tosun for securing the Toffees a first Premier League away win in seven attempts.
"It looked a bit iffy for us again but Cenk popped up with a super goal and that is why we bought him," Allardyce said of the striker, a January signing from Besiktas.
"It has paid dividends for us and it puts us on the 40-point mark, and even though mathematically we are not safe I do not think anyone can catch us now and we can start to prepare for next season."
|Johnson shares lead as Garcia misses cut in Texas|
|Career backup QB Luke McCown retires at 36|
|Texans ´optimistic´ about Clowney contract extension|
|Everybody wants to play under him – Ozil pays tribute to Wenger|
|Conte defends Chelsea record compared to Mourinho|
|LaLiga strugglers Espanyol show Flores the door|
|Messi is an alien but Sevilla can bring Barcelona back down to Earth, insists Montella|
|Four in a row for Wigan as Saints thrash Huddersfield|
|Reims´ latest vintage secure promotion to Ligue 1|
|Gloucester cruise into Challenge Cup final|
|Quiros claims one-shot lead despite rollercoaster round two|
|Millwall 0 Fulham 3: Sessegnon on target as Jokanovic´s side go second|
|Curry to begin modified practices on Saturday|
|Ancelotti welcomes Arsenal links, praises Wenger decision|
|Nadal produces ´best match of tournament´ as Dimitrov beats doubles partner|
|I think Arsenal would be good for a German coach - Podolski|
|Wilshere, Ramsey, Mertesacker and the best social media reaction to Wenger´s Arsenal departure|
|Watson haunts Royals with Super Kings hundred|
|Selby bracing himself for tough title defence|
|Exeter left ´disappointed´ by Ampadu transfer verdict|
|Froome thrilled with ´perfect´ build-up to Giro|
|Copa del Rey glory a good way to put European exit behind us, says Valverde|
|LMA hails Wenger´s impact at Arsenal|
|Wenger passes the torch as Arsenal face up to his formidable legacy|
|Gazidis: Arsenal cannot replace Wenger – we need a new path|
|Ronnie rivals never doubted Crucible attendance of ´snooker´s Tiger Woods´|
|Van Bronckhorst using Wenger´s methods at Feyenoord|
|Former NFL lineman Evan Mathis´ 1952 Mickey Mantle card sells for $2.88M|
|Wasps forward Johnson suspended for failed drugs test|
|I´d break another finger to win the Copa del Rey - Rakitic|
|Arsene Wenger: The Arsenal manager´s worst moments|
|Wright: More Arsenal changes needed after Wenger exit|
|Guardiola wishes Iniesta the best ahead of potential Barcelona exit|
|Real football people appreciate Wenger - Moyes, Warnock and more pay tribute|
|Guardiola set for contract talks with Manchester City|
|Controversial Slater score helps Storm to victory|
|Liverpool top, DVDs just invented and no Harry Potter – The world when Wenger joined Arsenal|
|Heynckes cannot compare Lewandowski and Ronaldo|
|Ronaldinho, Ronaldo, Messi, Mbappe and more – the stars Wenger claims he could have signed|
|Ferguson: Rival, colleague and friend Wenger is one of the greatest|
|Gattuso wary of challenge for Milan´s European place|
|Neuer returns to Bayern training after seventh-month absence|
|Wembley no advantage for Spurs in semi-final, warns Mourinho|
|WATCH: Dez Bryant works out with Odell Beckham Jr. as rumors swirl|
|PSG, Monaco, the CSL, France? - Wenger´s possible next moves|
|Rematches, rivalries and a mouth-watering Wembley clash – The pick of the 2018 NFL schedule|
|Wenger ´an example´ to foreign Premier League managers like Benitez|
|Wilshere: Wenger is like a father|
|Guardiola wants Wenger to find new role in football|
|Henry: Wenger´s Arsenal legacy is untouchable|
|Mourinho: Wenger feud shows how much I respect him|
|Conte: Top four still possible for Chelsea|
|Frizell inspires Highlanders win over Blues, Lions beat Waratahs|
|Majestic Nadal hammers Thiem in Monte Carlo|
|Aguero out for the season - Guardiola|
|Wenger´s 22-year Arsenal tenure will not be matched, says Conte|
|Celtic would let Rodgers move to Arsenal|
|Squillaci, Cech & Wenger´s worst signings at Arsenal|
|Heynckes: I cannot imagine Wenger at another club|
|Thank you Arsene - Emery pays tribute to Wenger|
|Fabregas and Van Persie join tributes to Arsenal boss Wenger|
|Smith confirmed as England national selector|
|1,228 matches and seven FA Cups - Wenger at Arsenal in Opta numbers|
|Mertesacker ´emotional´ as Wenger announces Arsenal departure|
|Ancelotti, Tuchel, Henry – Where do Arsenal turn after Wenger?|
|Klopp doesn´t want Liverpool to chase Golden Boot for Salah|
|´The Arsene Wenger Stadium´ - Former Arsenal players call for tribute|
|Wenger was so good ´it was scary´, says Merson|
|Shields requests to be released for England duty|
|Khan: ´Cheat´ Alvarez got off lightly|