Real Madrid trail Chelsea 1-0 at halftime in their Champions League quarter-final second leg at the Bernabeu, and Los Blancos fans are not happy.The Blues took the lead on the night through an excellent team goal as Timo Werner laid off Mason Mount, who expertly curled the ball into the far corner.Los Blancos, however, still lead the tie with a goal, but their demanding fan base was unimpressed by the fact that Madrid were largely overrun by the Premier League outfit and distinctly second best throughout the first period.One player who has particularly faced backlash for his anonymous first-half performance is midfielder Toni Kroos. Manager Carlo Ancelotti has faced criticism in the past for sticking with Madrid's trusted but aging midfield three, and Twitter users feel his display proves why the Spanish giants need to inject something new into the middle of the park.Here are some of the best tweets in regards to the German international's first half:Kev@fedeballerTake Kroos off and bring on Camavinga for the love of god8:43 PM · Apr 12, 202261Take Kroos off and bring on Camavinga for the love of godrmtea@sanitasfcI can't defend Kroos this time8:43 PM · Apr 12, 2022291I can't defend Kroos this time🏴󠁧󠁢󠁷󠁬󠁳󠁿@FalseNueveKarimKroos with another stinker8:43 PM · Apr 12, 20226Kroos with another stinker https://t.co/ciB3Vi7qReleah_rmfc@leah_rm13Kroos has been bad but everyone’s just as bad . We are a finished club 8:43 PM · Apr 12, 2022342Kroos has been bad but everyone’s just as bad 💀. We are a finished club 😭😭😭😭Yahya 🇲🇦@LeonHegerbergKroos bro you're not okay Camavinga needed asap8:42 PM · Apr 12, 20222Kroos bro you're not okay Camavinga needed asapℑ@filmnobelpreisWhen Kroos starts playing passes to the opponent, you know there's something up8:42 PM · Apr 12, 202211When Kroos starts playing passes to the opponent, you know there's something up𝙎𝙖𝙦𝙚𝙚𝙯𝙮@SaqeezyyBring Cama for Kroos ASAP IDFC RN8:42 PM · Apr 12, 20229Bring Cama for Kroos ASAP IDFC RNFinicius@finiciusS@MikhaeIII Kroos getting cooked in midfield ffs8:43 PM · Apr 12, 20221@MikhaeIII Kroos getting cooked in midfield ffsMarco 🍂@AnirbanTalukd15Never start Kroos in big games again!! We never learn!!Fucking tractor!! finished#UCL #RealMadrid8:43 PM · Apr 12, 2022Never start Kroos in big games again!! We never learn!!Fucking tractor!! finished#UCL #RealMadridMarco 🍂@AnirbanTalukd15Never start Kroos in big games again!! We never learn!!Fucking tractor!! finished#UCL #RealMadrid8:43 PM · Apr 12, 2022Never start Kroos in big games again!! We never learn!!Fucking tractor!! finished#UCL #RealMadridReal Madrid fans for Eduardo Camavinga to play against ChelseaThirty-two year-old Kroos was part of the legendary Madrid midfield that won four Champions League titles in five seasons, but many feel it is time to give younger options a chance in midfield.The 2014 World Cup winner simply could not handle N'Golo Kante and former teammate Mateo Kovacic as Chelsea took a huge step towards progressing to a potential semi-final against either Manchester City or Atletico Madrid.An option to bring in from the bench is 19-year-old wonderkid Eduardo Camavinga, who has been a revelation in his debut season for Real Madrid since his arrival from Stade Rennais in the summer.The French teenager is an energetic presence in midfield and has proved already this season that he can cut it at the highest level, whether it be a threat going forward, or a solid defensive presence. Camavinga has made 30 appearances in his inaugural campaign for Real Madrid, including six in the Champions League. Ancelloti has clearly stuck with Kroos for European nights, with the German having almost three times as many minutes as Camavinga in nine UCL games.