"I am not afraid of that and I don't think about that", he said after the game.
Mikel provided an assist for Odion Ighalo to score the opening goal before he got on the scorers' sheet himself as the Eagles took a 2-0 half time lead.
Speaking in a post-match press conference after Nigeria win, Rohr said: "Let us not forget that it is not finish yet because we have only nine points".
Three-time champions, Nigeria, will play Cameroon on Monday in Yaounde in a Day Four encounter of the 2018 FIFA World Cup Africa qualifying race with five points clear of second-placed Zambia and seven ahead of third-placed Cameroon.
Both teams clash again on Monday with Broos admitting that his side will be playing for pride.
After a rather tentative start by the home team, Ighalo marked his return with the opening goal after 29 minutes.
As if that was not enough, Mikel Obi, with a corner kick taken by Victor Moses, slipped in the second goal at the 41 minute.
The result left Cameroon a full seven points adrift of group leaders Nigeria, who are the clear favourites to secure a place in the Russian Federation 2018 field.
Perhaps, substitute Iheanacho failed to read the script that the Eagles were playing the African champions, and made a decision to head the fourth from a sublime Ogenyi Onazi pull -out with 13 minutes left.
Algeria will welcome Zambia to Constantine on Tuesday night.
"They were better, faster and more determined than us in one against one".
Ghana, seeking a fourth consecutive World Cup appearance, fell behind midway through the opening half when Congo captain Thievy Bifouma scored from close range.
"I must confess; I am highly happy and impressed that we are getting it right and moving with the right attitude towards the World Cup qualification as well as its preparation proper". "We dedicate this win to Carl; I am sure he will be very happy about this".