Spurs’ start to their Champions League comeback has been a mixed bag.

Their ‘home’ game at Wembley Stadium ended in defeat at the hands of French powerhouses Monaco, but a tricky trip to Russia saw a positive scoreline as Mauricio Pochettino’s team ran out 1-0 victors against CKSA Moscow courtesy of another goal from Heung-min Son.

But, arguably, Tottenham’s toughest set of fixtures are now upon us, with a double-header against German outfit Bayer Leverkusen. The Bundesliga boys may not be absolute giants of the European game, but Roger Schmidt’s side are quietly building a reputation for their energetic play, which is complimented by some technically excellent players.

Bayer sit in mid-table in their domestic division and have drawn their opening two Champions League fixtures, proving they will be no pushovers on Tuesday night. So, who should Pochettino and his men be watching out for? Well, here are THREE Bayer danger men…

Bernd Leno

Football - Bayer 04 Leverkusen v Manchester United - UEFA Champions League Group Stage Matchday Five Group A - BayArena, Leverkusen, Germany - 27/11/13 Bayer Leverkusen's Bernd Leno looks on after colliding with Manchester United's Shinji Kagawa (R) Mandatory Credit: Action Images / John Sibley Livepic EDITORIAL USE ONLY.

Leno hasn’t been enjoying the finest of seasons thus far, but the German stopper remains a formidable goalie. Spurs are likely to get chances across the 90 minutes – so it will be vital that the likes of Son and Vincent Janssen are on top of their game when opportunities come.

Javier Hernandez

Football Soccer - Bayer Leverkusen Training - BayArena, Leverkusen, Germany - 17/10/16 Bayer Leverkusen's Benjamin Henrichs (L) and Javier Hernandez during training Reuters / Wolfgang Rattay Livepic EDITORIAL USE ONLY.

A familiar face for Premier League followers, Hernandez has been a goal machine since his move to Germany. Indeed, ‘Chicharito’ has netted five already this term in Bundesliga action and a further one in the Champions League. Although he’s unlikely to impose himself on the game, Hernandez is a constant danger in the 18-yard box and will keep Spurs’ centre-backs on edge for the 90 minutes.

Hakan Calhanoglu

YouTube addicts will know all about Calhanoglu. The Turkish playmaker has developed a reputation for his set-piece prowess and is widely hailed as one of the most dangerous free-kick takers in Europe. However, there is more to the 22-year-old’s game than just smashing the ball at goal from distance, with his neat passing and supreme close control making him a very dangerous No.10 and a threat from out wide.