The 26-year-old has spent the last two seasons at Bayer Leverkusen but struggled for consistency during former coach Xabi Alonso's tenure.
Tella has featured primarily as a winger during the pre-season under new manager Erik ten Hag, having previously occupied numerous positions under the previous boss.
However, his flashes of brilliance have seen the likes of Nottingham Forest, Brighton and Hove Albion, Leeds United, Burnley, and Brentford reportedly send scouts to watch the German sides recent friendly against Chelsea at Stamford Bridge.
He has featured 79 times for the Bundesliga outfit, scoring ten goals whilst providing 11 assists since joining the club from Southampton in a 23.3 million Euro deal.
No official bids have been reported for the Nigeria forward who has two international caps to his name, scoring once against Jamaica in an international friendly in May.
Manchester United are bracing for a tough trip to Aston Villa after midfielder Casemiro was ruled out through suspension, deepening a growing list of selection problems for manager Ruben Amorim.
AC Milan have taken a significant step towards signing West Ham United striker Niclas Fullkrug ahead of the January transfer window, with reports indicating personal terms have been agreed between the 32‑year‑old forward and the Italian club.
England captain Harry Kane is once again proving to be one of Europe's deadliest finishers and, given the pace he has set this season, many believe he could eclipse Robert Lewandowski's Bundesliga single‑season goals record.
Ivory Coast winger Amad Diallo has revealed that Manchester United's dressing room was 'very disappointed' after the 4-4 thriller against Bournemouth on Monday.
