Cristiano Ronaldo might be gone, but Gareth Bale has not stepped into the void at Real Madrid. James Walker-Roberts looks at the threats he is facing on and off the pitch… Four games. Four wins. 15 goals scored. Two conceded.That was enough for the Real Madrid hierarchy to decide that Santiago Solari was the right man to replace Julen Lopetegui, extending a caretaker arrangement into a permanent deal for the former reserve team manager until 2021. Whether he lasts that long remains to be seen, but Solari, a former Real player who has been working with the youth sides since 2013, has already made an impact as head coach.Summer signing Alvaro Odriozola has started every game under Solari and, after a slow start to life at the club, looks to be getting into form. Left-back Sergio Reguilon has come up from the reserve side and, like Odriozola, has started the last four matches. Another youth product, Javi Sanchez, has been on the bench.But perhaps the most significant move made by Solari has been the introduction of Vinicius Junior to the squad.Signed by Real Madrid last year for a reported fee of 46 million euros, Vinicius joined from Flamengo this summer…