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The rotational system is needed especially considering the FA Cup, EPL and ECL. Also the flow will come, it just takes time. Also they are developing a Youth System, but atm Chelski owner wants trophies, which a Youth System can't give for at least 10 years. And also, they are making a Youth System, and building grounds. Two products were Terry and C Cole. With Lampard an almost permanent MF, we have the interchangeable Geremi and Makelele, Duff is almost a certain started on the Left, leaving the right flank to a non-injuried/need-more-time-to-get-fit Veron, or maybe Cole. Considering injuries will hit, at least a couple, that's not too many changes. Petit is out, be he'll retire soon. As for defence, they don't have many choices as Desailly will soon be gone. So the CBs are Gallas, Terry, Huth. And the LB and RB have two alternatives each. Up front Eidur rarely plays, and Jarrel and Adrian are preferred, unless in ECL.
Ajax have the best Youth System, which is why they can do pretty well year in year out in the EPL without too much cash, and they're stars leaving very often, mainly of Spain or Italy.
If Kazman transfers wisely at the end of the season, he could be huge, ie. Ronaldo and van Nisterooy big! (PSV talk)