Middlesbrough v Chelsea

Middlesbrough v Chelsea
John Terry should be fit despite aggravating a groin problem in Sunday's win at home to Manchester City.

Claude Makelele and Michael Ballack, both ruled out of the City game with injuries, are back in training and could be involved.
If Terry and Ballack are out, how large of a spanner would that throw into many, many fantasy teams? I think it's a pretty safe bet that both will play, but still...