The 21-year-old - Steven Gerrard’s ninth summer signing - impressed for NAC Breda last season, scoring five goals in 12 matches for the Dutch outfit. He has also netted twice in six appearances for the Roma first team.
Nigerian forward Sadiq began his career in his homeland before joining Spezia in Italy’s Serie B. A loan spell with Roma in 2015 convinced them to sign the 6ft 3in attacker permanently.
After a series of good performances for Roma’s youth side, he broke into the first team at the age of 18 in November 2015, scoring his first senior goal two months later.
He then spent time on loan with Bologna and Torino and at the 2016 Olympic Games, grabbed two goals in the third-place match against Honduras, with Nigeria’s 3-2 win sealing the bronze medal.
Speaking to RangersTV Sadiq - whose deal is subject to international clearance and who claimed that, “in Nigeria I am compared to the legend Kanu and Emmanuel Adebayor” - said: “It is very good to be here, it has been good so far and I can’t wait to start.
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“I truly am excited to be joining Rangers, it is a historical club and I can’t wait to play here.
“I found out Rangers were interested in me about a month ago when I was on holiday in Nigeria. I got a phone call from my agent and he told me about Rangers and I said let’s see what happens.
“To be honest the plan was to stay at Roma this season but when Steven Gerrard calls you can’t say no.
“He called me about two weeks ago and from there I started changing my mind. Even if the plan was to stay at Roma I couldn’t turn him down.
“He told me about the team; even though I already knew about Rangers and that they are the most successful team in the world.
“He told me about the players and said everybody would be at my side if I came here to help me and he would also help me to go forward in my career.
“We didn’t talk that much about how the team or I would play it was all just Rangers, Rangers, and Rangers.
“In Nigeria we do follow the English Premier League but also the Scottish Premiership. I knew about Rangers because everybody knows about them.”