"New no. 2 named"

Per KUMB:

Zeljko Petrovic is strongly tipped to be named Avram Grant's assistant manager later this week.
44-year-old Petrovic has, according to the Dutch media, signed a one-year deal with the Hammers - a deal that is set to confirmed within the next few days.

The former right-back, who represented Yugoslavia between 1990-1998 spent his playing career at a number of top clubs across Europe, including Seville, PSV and Dinamo Zagreb.

Upon hanging up his boots in 2003 Petrovic coached Feyenoord as part of a management team headed by Ruud Gullit before moving on to Boavista in a managerial capacity in 2006. However just six weeks after taking the post he was fired following poor initial results.

In 2007/08 he took Waalwijk to runners-up spot in the Eerste Divisie before becoming assistant to former Spurs boss Martin Jol at Hamburg in 2008/09, where the duo achieved a fifth-placed finish in the Bundesliga. However that was also short-lived after Jol walked out following disagreements over transfer funds; he later joined Ajax.

* Further reports from the Netherlands insist that Petrovic has revealed fellow countryman Miralem Sulejmani is set to join him at West Ham on loan. The Ajax winger, who cost the Amsterdam-based club a Dutch record €16.25million Euros when they signed him from Heerenveen in 2008 has fallen out with Martin Jol, claiming the 54-year-old had 'killed his career'.

The article adds that United will take Sulejmani on loan for the season with an option to buy for €6.25million next summer.
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who is this sulejmani and what does he do? also, like, what does petrovic do?