Enzo Maresca’s side has scored 16 goals and conceded just three in the three opening rounds of this season’s UEFA Conference League.Their perfect score, however, will be seriously challenged tonight as they play at Heidenheim, another team that has won all of its games so far.The Bundesliga slot is anything but a rival that should be underestimated, and the Blues are surely aware that the Germans will have a special motive on Thursday night at their Voith-Arena, a 15,000-seater, one of the smallest venues the Londoners will visit this season.##NAJAVA_MECA_8528841####EDITORS_CHOICE##As things stand, Maresca will repeat his previous habit of reshuffling the squad since he has so many players at his disposal.”It’s an important competition,” said Maresca in his pre-match press conference. “First of all, it’s a European competition. The main reason is because it’s a competition. But, since we started, we have tried to share minutes with the entire squad. In some games, we try to use some young players. It is like this now, and we will try to continue in the same way.”Former Chelsea forward pushing his body to the limitsThe Chelsea boss was asked if Christofer Nkunku is unhappy with reduced playing minutes.”No, not at all. I spoke to Christo days ago, and he did not say he was unhappy. For sure, like many other players, he would like to play minutes. However, we have so many games, especially in December. Against Leicester, Joao played, Enzo played and Benoit played. Since we started, for me, there have not been two squads – there is only one squad. They can play Conference League or the Premier League and the proof was against Leicester,” concluded Maresca.UEFA CONFERENCE LEAGUE – ROUND 4Thursday 18.30: (3.80) Astana (3.35) Guimaraes (2.05)20.45: (3.20) Borac Banja Luka (3.10) LASK (2.40)20.45: (2.10) Celje (3.50) Jagiellonia (3.40)20.45: (1.95) Cercle Brugge (3.50) Hearts (3.90)20.45: (8.50) Dinamo Minsk (4.50) Copenhagen (1.40)20.45: (6.50) Heidenheim (4.40) Chelsea (1.50)20.45: (1.80) Molde (3.70) Apoel Nicosia (5.00)20.45: (1.85) Noah (3.50) Vikingur (4.40)20.45: (1.32) Panathinaikos (5.80) Helsinki (10.5)20.45: (1.45) St.Galen (4.50) TSC Backa Topola (7.00)20.45: (4.90) TNS (3.60) Djurgarden (1.75)23.00: (1.45) Fiorentina (4.40) Paphos (7.50)23.00: (2.50) Lugano (3.40) Gent (2.80)23.00: (5.80) M.Boleslav (4.10) Betis (1.57)23.00: (1.22) Olimpija (6.25) Larne (14.0)23.00: (2.45) Omonia (3.40) Legia (2.85)23.00: (1.30) Rapid (5.20) Shamrock (11.0)***odds are subject to change***