Derby County could strengthen even further during this January transfer window with speculation over record-breaking transfer fees failing to go away.
Ryan Shotton, as expected, turned his loan move from Stoke City to the iPro Stadium into a permanent one. Aston Villa striker Darren Bent and former Chelsea defender Isak Ssewankambo also signed on the dotted line. However, according to Derby's CEO, that may only be the tip of the iceberg.
"We have already concluded some early-January business and we believe there is more business ahead of us," Rush told the Derbyshire Telegraph.
"We are focused on that and most importantly we are focused on the field in terms of the forthcoming games."
Despite signing Bent on loan for the rest of the season, according to the Sun, the East Midlands side are still interested in bringing in another big named striker, with both Troy Deeney and Luc Castaignos having been linked to the club for what would be club record-breaking transfer fees.
The Rams have scored 46 goals in 24 league games this season, a rate of nearly two goals per game, so it could be argued that another striker is the last thing McClaren should worry about.
Nevertheless, with Bent already signed and money reportedly in the bank, it wouldn't be a surprise to see the promotion favourites try and blow their rivals out of the water with their newly-found financial power. At the very least, as Rush confirmed, Derby are far from finished in the transfer window for this month.