Supporters planning to attend Friday's Development Squad game at Chelsea need to purchase their tickets in advance.
With no sales on the night at Stamford Bridge, tickets are available from the West Ham United Ticket Office now.
Tickets are priced at £5 adults and £3 Under-18s and Over-65s.
Supporters can purchase online at whufcboxoffice.com or over the telephone on 0871 529 1966 via option 3 up until 1pm on Wednesday 13 May.
Supporters purchasing in person can do so from the Betway Stand Ticket Office up until 1pm on Friday 15 May.