Newcastle spent heavily over the summer, bringing in a host of new signings.
Newcastle spent heavily this summer in a bid to avoid another relegation battle this season - but so far, their transfer business hasn't helped them.
However, McClaren remains without a Premier League win after seven games this season, though the 2-2 draw against Chelsea last weekend was a decent result.
Fans are already looking towards new signings in January, so one month after the summer transfer deadline, where do Newcastle still need to strengthen?
Mbemba has made a promising start to life in English football, but veteran Fabricio Coloccini is still struggling in the heart of the Magpies defence. With Mike Williamson frozen out and Steven Taylor injured, McClaren has been left short of options at centre back. Another young, athletic defender like Mbemba is wanted by Newcastle fans, it would be little surprise to see McClaren attempt to fulfil that wish.
Not only have Massadio Haidara and Paul Dummett failed to impress at left back, but their injury problems have left McClaren with only Kevin Mbabu able to play there. Left back should, arguably, be Newcastle's primary position of concern heading in to January, unless Swiss youngster Mbabu continues to impress after a superb debut against Chelsea, which is a lot to ask of such an inexperienced player. McClaren needs an addition at left back, without question.
Mitrovic has already had his fair share of disciplinary problems at St. James' Park, and with Papiss Cisse serving up ineffectual performances so far this season, McClaren desperately needs another striker. QPR's Charlie Austin, who hit 18 Premier League goals last season, would be ideal for the Magpies - and with his contract expiring next summer, Newcastle could yet sign him for a knockdown fee, and reunite him with his former QPR coach McClaren.