It's part of Ajax's centenary celebrations, which began on Saturday when the Amsterdam club played their home game against FC Twente wearing old-style kit (long baggy shorts, numbers from 1 to 11, button-collared shirts with no sponsorship, etc). See this report from the official Ajax site (and click on the "Fotoverslag" links at the bottom for more pictures). Seems like their movement might have been restricted a bit though - Ajax lost 1-0.

There will be all sorts of stuff going on throughout the year, including a friendly between Ajax and Panathinaikos, re-creating Ajax's first European Cup win in 1971 (at Wembley - the original not the re-creation) and featuring some of the players from that game (eg Cruyff, Neeskens).

Anyway, what you want to hear about is the summer tournament....

It's scheduled for August 3rd to 5th, and will feature a pretty impressive line-up: Ajax, Arsenal, Barcelona, Lazio.

The other 3 clubs could put together a pretty impressive "ex-Ajax" team (and I say that without knowing if Lazio have any!).

Thanks to Nel and Alan for the following translation of the bit about the tournament from this page.

"The main force of Ajax plays the traditional jubilee competition on 3 to 5 August. Especially for this celebration period, the clubs are of international top level this time. The selections of Ajax, Barcelona, Lazio Roma and Arsenal are competing in a competition that as far as football quality is equal to Euro 2000."

The page goes on to say that Ajax season ticket holders will get first shot at tickets for the tournament, following which there will be a general sale. There will also presumably be some on sdale through the Arsenal. We will of course let you know as soon as we hear more.