The Super Eagles lost 2-1 to England in a friendly at Wembley on Saturday.
Of Wolves' Ikeme, 31, who last played first-team football in March 2017 and may have proved the solution for a team often accused of lacking a convincing goalkeeper, Rohr added: "There is also the opportunity to have a think about our sick goalkeeper, Carl Ikeme".
"I think the pace in the team, you can feel it, and that is why we had some problems in the first half".
"It's very exciting to play in this wonderful stadium".
"In the second half we corrected some mistakes and played a lot better". The players want to do well - you can see from how they play, the change in system to five at the back.
"We missed totally the first half but the preparation wasn't good".
The Super Eagles have arrived in Vienna, Austria where they will be based ahead of the 2018 FIFA World Cup in Russia, Completesportsnigeria.com reports.
Nigeria captain John Mikel Obi said: "We know we need to improve".
"We have to learn together as a team, we have to improve and that is why we played this game against such a quality side".
Gary Cahill gave England the lead after seven minutes from a header as the Nigerian defence stood still.
Arsenal's Alex Iwobi pulled one back for the visitors, who are also World Cup-bound, but England did enough to secure the victory. Nigeria's next game is against the Czech Republic in Austria before they depart for Russian Federation.
Mikel knows Nigeria have to sharpen up in Russian Federation if they to get through a tough group featuring Argentina, Iceland and Croatia.
"We will try to see the team that has the chance of starting the World Cup against Croatia".
Iwobi appeared to be injured late in the game but the coach said: "This was due to cramp from all the travelling we have been doing".
"I had a decision to make whether to play him after turning up late", England coach Gareth Southgate said.