Manchester United fans were worried to see Christian Eriksen dropped from the matchday squad for their team's Premier League clash against Newcastle United on Sunday (October 16).The Denmark international has been a revelation in manager Erik ten Hag's team ever since he joined them on a free transfer this summer. He has assisted three goals in his 12 appearances across competitions this season.However, the Red Devils will have to navigate through this tricky Premier League clash against the Toons without the former Brentford star's services. Instead, the Dutch tactician has gone with a double pivot featuring Casemiro and Fred.The two Brazilians started together to great effect in United's UEFA Europa League win against Omonia on October 13. Eriksen's absence naturally raises concerns about the midfielder's fitness and whether he has faced a fitness issue.Here are some of the best reactions to Eriksen's exclusion from United fans, as found on Twitter:Manchester United@ManUtd Presenting the United line-up for #MUNNEW #MUFC || #PL115932563🚨 Presenting the United line-up for #MUNNEW 👊#MUFC || #PLMatt 🇾🇪@Mattmufc2002No Eriksen. Bed twitter.com/manutd/status/…Manchester United@ManUtd Presenting the United line-up for #MUNNEW #MUFC || #PL11961🚨 Presenting the United line-up for #MUNNEW 👊#MUFC || #PLNo Eriksen. Bed twitter.com/manutd/status/….@Mr_AyLeeWait, what happened to Eriksen? twitter.com/ManUtd/status/…Manchester United@ManUtd Presenting the United line-up for #MUNNEW #MUFC || #PL84271965🚨 Presenting the United line-up for #MUNNEW 👊#MUFC || #PLWait, what happened to Eriksen? 😭 twitter.com/ManUtd/status/…Ukachukwu@Ukachukwuu_@ManUtd Is Eriksen injured? @ManUtd Is Eriksen injured? 😳Himansh@HimanshSingla_Eriksen not even on the bench. Hopefully he's rested and nothing else.Eriksen not even on the bench. Hopefully he's rested and nothing else.DR@utddaviddEriksen not on the bench he better not be injured3Eriksen not on the bench he better not be injuredray🎸@rayyanrazWtf Eriksen isn’t even on the bench twitter.com/manutd/status/…Manchester United@ManUtd Presenting the United line-up for #MUNNEW #MUFC || #PL87172034🚨 Presenting the United line-up for #MUNNEW 👊#MUFC || #PLWtf Eriksen isn’t even on the bench twitter.com/manutd/status/…EddieUTD@EddieUTD7Eriksen is a very big miss todayEriksen is a very big miss todayDazzmondo@Dazzmondo95Eriksen out makes me a bit nervous. Won't be an easy game against Newcastle1Eriksen out makes me a bit nervous. Won't be an easy game against NewcastleElsewhere, Cristiano Ronaldo has been handed just his second Premier League start of the season. The Portugal international last started a domestic match for United on August 13, when the Red Devils lost 4-0 to Brentford in London.Anthony Martial is an obvious exclusion from the 20-man squad after he picked up a first-half injury in a 2-1 win against Everton on October 10.A Manchester United win vs Newcastle United would see them enter top four above ChelseaManchester City and Arsenal seem unstoppable at the moment, which is why Manchester United would be wise to temper their expectations this season.After finishing in sixth position last campaign, a top-four finish would be seen as a successful achievement under Ten Hag. The opportunity to play in the UEFA Champions League has become akin to a trophy for some teams.Ronaldo's desire to leave the club after they missed out on Champions League football underlines the importance of the competition towards a club's pull in the transfer market. United will have the opportunity to leapfrog Chelsea in the table on Sunday (October 16).Cristian Ronaldo wishes to leave Manchester United after the club missed out on Champions League qualification.A win or a draw against Newcastle would, at least temporarily, ensure that United are fourth in the table. Chelsea, who have one more point (16) than United after eight league games, are set to take on strugglers Aston Villa today.