The new Liverpool centre-back has been pictured following his loan move.
Will Randall has become Wolverhampton Wanderers's first signing of the January transfer window.
The pair both arrived in English football after success in the Dutch Eredivisie.
Lucas says there have been a few standout players among the youngsters who have been given the opportunity to impress.
The Australian has been linked with a move from Celtic to Leeds.
West Ham United are unbeaten in their last eight matches.
Chelsea interim manager Guus Hiddink spoke to the media ahead of tomorrow night's Premier League clash with West Brom at Stamford Bridge.
Crystal Palace’s Dwight Gayle has been linked with Derby County, QPR, Newcastle and Norwich.
Manchester United have been linked with Tottenham boss Pochettino.
Celtic are unlikely to sell Tom Rogic to Leeds, according to reports.