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."
|Lopetegui backs Modric over Ronaldo for individual prizes|
|Goretzka to start against former club Schalke, confirms Kovac|
|Fisher shoots first 59 in European Tour history|
|Simeone defends Ronaldo after controversial Champions League red|
|Slater sees Storm into Grand Final, awaits fate over ´shoulder charge´|
|Hogg to miss Scotland´s November Tests following ankle surgery|
|Osaka through as Azarenka and Garcia crash out|
|Burgess weighing up legal options after being cleared in Rabbitohs investigation|
|Uncapped Cottrell and Gordon named in Wallabies squad|
|He´s done fantastic work - Mourinho hails Wolves boss Nuno|
|Joshua v Povetkin: No need for fireworks on AJ´s Wembley return|
|Six titles, 204 goals - Aguero´s incredible City career in Opta stats|
|Read to miss Argentina clash, Ioane brothers sign new deals|
|Pedro allays injury fears after Europa League clash|
|Dilly dilly to all the Cleveland fans! Mayfield promises further Browns success|
|Manchester United ´hell´ left Zaha depressed|
|Jackson hesitates in naming Mayfield as Browns´ starting QB|
|LeBron congratulates Browns for ending 635-day winless streak|
|Aguero Extension: 10 of the best goals from the Manchester City star|
|Aguero signs City contract extension until 2021|
|Stress from drink-driving charge may have contributed to Lloris injury – Pochettino|
|CBF backs Cruzeiro´s Dede appeal and suggests VAR investigation|
|The big Friday Premier League quiz|
|Red Sox clinch AL East with win over Yankees|
|Brighton star Knockaert reveals battle with depression|
|Bud Light beer fridges open after Browns snap 19-game winless streak|
|Browns end 635-day drought with first win since 2016 after downing Jets|
|Blue Jays overturn 8-2 deficit in improbable ninth-inning comeback|
|Colo Colo 0 Palmeiras 2: Scolari´s men poised for Libertadores SFs|
|Tour Championship would enhance successful year, says Tiger|
|Pogba: Man United getting better after winning run|
|What bothers me is that he has time to even do that – LeBron responds to Trump tweet|
|Cowboys most valuable NFL team for 12th successive year|
|Mkhitaryan aiming for glory with Europa specialist Emery|
|Sarri: Pedro´s injury is not too serious|
|This Week in U.S. Sports: Drama in Minnesota, a Judge returns and tragedy in Iowa|
|Tottenham will overcome rough patch – Lamela|
|Torreira impresses for Arsenal but leaves with knock|
|Gattuso urges Higuain to be less predictable with his movement|
|Steelers´ Brown: ´Obviously I don´t want to be traded´|
|Woods, Fowler share Tour Championship lead|
|LeBron James backs Serena Williams after US Open controversy|
|Thiem into St Petersburg quarters, but retiring Youzhny bows out|
|Wigan clinch home semi-final with win over Huddersfield|
|Can apologises following sexism accusations|
|De Bruyne expects to be back for Manchester derby|
|Celtic 1 Rosenborg 0: Griffiths late show lifts Hoops|
|Woods eagles 18 to make 65 at Tour Championship|
|Arsenal 4 Vorskla 2: Aubameyang at the double in entertaining triumph|
|Dudelange 0 AC Milan 1: Deflected Higuain goal spares Gattuso´s blushes|
|Birthday boy Rashid inspires Afghanistan to Asia Cup win|
|Sarri feeling sorry for ´unlucky´ Morata|
|Ryder Cup pick Garcia shoots 66 at Portugal Masters|
|Ronaldo, Zidane, Cantona and the most infamous red cards|
|Villarreal 2 Rangers 2: Arfield and Lafferty steal point for Gerrard´s men|
|PAOK 0 Chelsea 1: Willian strikes as Morata misfires|
|Rain delays Ostapenko in Seoul, Wang books Guangzhou semi|
|Pochettino backs Kane to end goal drought|
|We figured it out - 76ers´ Markelle Fultz rebuilds jump shot|
|Joshua: Povetkin my second-toughest fight|
|Relaxed Pochettino not pushing panic button|
|Why Manchester City fans must fix their relationship with the Champions League|
|Majestic Giorgi ends Wozniacki´s reign in Tokyo|
|Pochettino unwilling to risk Alli fitness|
|Bigger Champions League tests to come, warns Pogba|
|Eight for 10! - Nadeem spins his way to world-record figures|
|A 4-1 lead cut to 3-2 by VAR, but Quakes have no complaints after Atlanta defeat|
|UEFA opens disciplinary proceedings against Ronaldo|
|Joshua v Povetkin: Recapping AJ´s previous world title defences|
|Players told to ink twice over showing tattoos at Rugby World Cup in Japan|