14 May was set as deadline for participating member associations to release a list of 30 players, which Nigeria also complied with.
'What was really worrying was when they changed their shape and we went into our shell a little bit.
The goal lifted the Super Eagles, who started to knock the ball around with more confidence.
Alex Iwobi woke up Nigeria immediately in the second stanza, pulling a goal back a minute after the break with a clinical strike, following up Ighalo's shot that hit the upright, 2-1.
England dominated the first-half, and took the lead after just seven minutes, with Gary Cahill powering home a header from a corner.
"So, we have to continue to play like this".
"We know we have to and we have to keep playing this way".
Not since 1966 have England won the World Cup following the country's group-stage exit in 2014.
"We have to make the best use of the two weeks left before our first game in Russian Federation".
Seventeen of the 23 players picked by the German manager were in action at Wembley Stadium, with Mikel Obi, Kenneth Omeruo, Ogenyi Onazi and Ahmed Musa, who represented Nigeria at the 2014 World Cup in Brazil, heading to Russian Federation to appear at the finals for the second time.
Rohr said he expected midfielder Wilfred Ndidi to recover from injury in time to play against the Czech Republic in a friendly on June 6. So credit to him.
13' CHANCE! England are running riots over their visitors and Raheem Sterling run over the Eagles defence to create two quick scoring opportunities.