Speaking afterwards, Hazard praised Egypt's performance in the absence of Premier League Golden Boot victor Salah, who he hopes will take part at the showpiece tournament.
Nigeria, who have lost three of their last four games and drawn the other, kick off their World Cup campaign against Croatia on June 16, but they looked disinterested during the opening half as the Czechs dominated. "There are many aspects that we need to improve".
"It's hard to say, but I think our group and togetherness", he said when asked about the strengths of his national team.
Salah stated that for his personal goals he is mainly looking to support the team qualify by scoring goals and help the team do better in matches in general.
The Liverpool superstar left the field in tears as his Champions League dream was crushed, simultaneously leaving his World Cup hopes hanging by a thread. "I think we are quite the same - it is 50-50 - England have a lot of good players, we also have good players so we will see".
The Spaniard had raised eyebrows by slotting Laurent Ciman into skipper Kompany's number four shirt and keeping him on for 90 minutes.
Will he continue his incredible goalscoring form in Russian Federation this summer?
Hazard created the first goal on 27 minutes, bursting into space and unleashing a fierce shot which Egypt keeper Essam El-Hadary parried into the path of Lukaku, who converted from close range.
Batshuayi set up Fellaini's goal by beating an Egypt defender and cutting back the ball.
Also playing on Wednesday were Panama, whose preparations ended on a low note as they slumped to a 1-0 defeat by Norway after an early goal by Joshua King.
Unquestionably, Mohamed Salah is one of the men of the season.
Egypt opens its World Cup campaign in Russian Federation against Uruguay on June 15, Belgium's first Group G match is against Panama on June 18.
"We know what we are", said Hazard.