Liverpool forward Luis Diaz has come under scrutiny for the rave reviews he has been getting since joining the Reds in January.The Colombia international put out a star showing after coming on at half-time against Villarreal in the UEFA Champions League semifinals second leg on Tuesday. He scored a goal as Jurgen Klopp's side won 3-2 on the night and 5-2 on aggregate.He won the Man of the Match award as fans on social media labelled him the best January transfer in history. However, others pointed out that Diaz hasn't done enough to warrant the lofty claim.Here are some of those reactions on Twitter:WatkinsTheGoat🇨🇿@olliewatk11nsthis guy is so good but he’s getting overhyped way too much twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?2706Is Luis Diaz the best January signing of all time?this guy is so good but he’s getting overhyped way too much twitter.com/sportbible/sta…Haz🐑💵@Haz987123Don’t get me wrong he’s a class player but can’t help but think he’s slowly moving towards being overrated twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?15040706Is Luis Diaz the best January signing of all time?Don’t get me wrong he’s a class player but can’t help but think he’s slowly moving towards being overrated twitter.com/sportbible/sta…Lyle@Lylielyle0They really do exaggerate everything about Liverpool twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?15041706Is Luis Diaz the best January signing of all time?They really do exaggerate everything about Liverpool 😴😴😴😴😴 twitter.com/sportbible/sta…Danny Bland@BlanndddSomeone clearly didn’t watch Jelavics arrival at Everton twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?15045706Is Luis Diaz the best January signing of all time?Someone clearly didn’t watch Jelavics arrival at Everton twitter.com/sportbible/sta…Roberto@robertobkupNot even Liverpools best January signing of all time twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?15052707Is Luis Diaz the best January signing of all time?Not even Liverpools best January signing of all time twitter.com/sportbible/sta…KING👑@_IKENNA_He’s not even as good as Aubameyang. Y’all hyperbolic af twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?1708Is Luis Diaz the best January signing of all time?He’s not even as good as Aubameyang. Y’all hyperbolic af twitter.com/sportbible/sta…⌡. @iamJermainePCan’t even get in the starting 11 ffs. Great player but not even top 3 greatest signings tbhVidic says hello by the way. twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?4708Is Luis Diaz the best January signing of all time?Can’t even get in the starting 11 ffs. Great player but not even top 3 greatest signings tbhVidic says hello by the way. twitter.com/sportbible/sta… https://t.co/IESaUjhXOgTJ@_TJ932OThis is weird. I’d have no problem with them saying is he the best January signing, but how are you going to justify ‘of all time’ when he’s only been here 3 months. twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?301Is Luis Diaz the best January signing of all time?This is weird. I’d have no problem with them saying is he the best January signing, but how are you going to justify ‘of all time’ when he’s only been here 3 months. twitter.com/sportbible/sta…Hon. Abdulkarim Sufiyan@AbdoulSufiyanSuarez, Vidic, Evra, Bruno... he is not even the best Luiz to be signed in January. twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?21Is Luis Diaz the best January signing of all time?Suarez, Vidic, Evra, Bruno... he is not even the best Luiz to be signed in January. twitter.com/sportbible/sta…Hoodiey🍏🍏🍏@GreenHoodieyThe boy is a great player, no need to exaggerate. Vidic, Evra, Suarez & Van Dijk are the best January signings in PL twitter.com/sportbible/sta…SPORTbible@sportbibleIs Luis Diaz the best January signing of all time?152Is Luis Diaz the best January signing of all time?The boy is a great player, no need to exaggerate. Vidic, Evra, Suarez & Van Dijk are the best January signings in PL twitter.com/sportbible/sta…Luis Diaz has been nothing short of impressive since joining Liverpool from Porto in January. The former Atletico Junior man has adapted to Jurgen Klopp's tactics and has won fans with his energetic work rate and willingness to fight for the team's cause. He has bagged seven goals and three assists for the Reds thus far.However, it's early days to proclaim him the best January signing on his displays in four months. Nevertheless, the likes of Bruno Fernandes, Nemanja Vidic, Luis Suarez, Pierre-Emerick Aubameyang, Virgil van Dijk and Patrice Evra became legends at their respective clubs after arriving in January. So Diaz is in good company.Luis Diaz' introduction helped Liverpool reach third UEFA Champions League final in five yearsLiverpool travelled to the Ceramica Stadium, holding a healthy two-goal advantage over their Spanish opponents in the UEFA Champions League semifinal.However, manager Jurgen Klopp went to great lengths to suggest the tie was not over. Unai Emery's side proved him right when they took the lead inside the opening three minutes. They drew level on aggregate four minutes before the break and had Liverpool rattled in a first half that was totally controlled by the Yellow Submarines.Liverpool FC@LFCRelive the Reds booking their place in a 10th European Cup showpiece! Full match replay, highlights and reaction on @LFCTV GO 2072144Relive the Reds booking their place in a 10th European Cup showpiece! Full match replay, highlights and reaction on @LFCTV GO 👇However, the tide turned in the visitors' favour when Diaz was introduced at the break in place of Diogo Jota. The Colombian's impact was immediate, and there was a noticeable increase in the tempo of Reds' attack.Diaz scored the equalising goal on the night in an eventual 3-2 victory for his side, and his efforts saw him named the 'Man of the Match'. The Reds have started focusing on developing the next generation, and Diaz has shown that he could play a key role in helping the club continue their dominance.