Transfer Rater: Nicolas Tagliafico to Arsenal; Alex Sandro to Manchester City

Things change in the blink of an eye in football. The Football Whispers Index takes the latest transfer rumours and gives them a score out of five; the higher the score, the more realistic and reliable the Whisper.

Here are today's top five emerging whispers. And keep an eye on Transfer Talk for all the latest gossip.

Alex Sandro to Manchester City

With Benjamin Mendy the only recognised left-back for Man City, the club continue to monitor Alex Sandro's situation at Juventus, according to Calciomercato. The Brazilian's contract expires in 2020 and talks over extending that deal have reportedly stalled. The report claims City would face competition from Manchester United to sign Sandro.

Gabriel Barbosa to Crystal Palace

The Eagles are reportedly considering a surprise move for Brazilian striker Gabriel Barbosa, according to Brazilian outlet UOL Esporte. 'Gabigol' is currently on loan at Santos having struggled at Inter Milan after joining the Italian club in the summer of 2016. He has recaptured his best form back in Brazil, however, and leads the Brasileirao scoring charts with 14 goals.

Viktor Tsygankov to Tottenham Hotspur

Spurs are leading a number of European clubs in the race to sign Dynamo Kiev star Viktor Tsygankov, according to Teamtalk. The north London side have reportedly been following the 20-year-old for several months and are ready to launch a January move for the midfielder.

Exequiel Palacios to Barcelona

The Catalan club had representatives in attendance to watch the highly-rated Argentine in action for River Plate against Gremio in the Copa Libertadores, according to Sport. The 20-year-old has also been linked with Atletico Madrid, however River president Rodolfo D'Onofrio has confirmed no official bid has been lodged for Palacios.

Nicolas Tagliafico to Arsenal

Arsenal are considering a January move for Ajax left-back Tagliafico, according to Calciomercato. The Gunners are reportedly searching for a new full-back to replace the ageing Nacho Monreal. The 26-year-old has been capped ten times by Argentina and was a regular during their World Cup campaign in Russia.