A preview of Sunday's second round of fixtures in the Elite League.
Both teams won on opening day, the Hammers getting a last heat decider at Sheffield whilst Aces downed reigning champions Poole convincingly at Ashmore Park.
The visitors were without their dynamic Polish duo of Szymanski and Gancherek plus British champion Tom Read and former champion Gav Wheeler however The Aces were impressive.
They go to Horspath on a good day as it is Polish league round one and Hammers three Polish based world class stars all who raced well at Sheffield are unavailable. Chris Timms though returns from suspension for the home side who are also missing Milward and Riley and will rely heavily on Nowacki and Boaler.
The Paul Heard / Lee Aris led Aces look favourites to notch an unusual win at The Village where home track advantage could well be the equaliser.
Both teams lost close encounters first time round new boys Newport at Ipswich Sheffield home to Horspath,
Sheffield now have Australian International Bobby McMillan over and will hope to have Adam Stephenson in their ranks plus Ryan Hoyland.
Newport have a solid line up led by Mark Carmichael, Shaun Rudman and Jamie Ball. Polish signing Adam Bozejewicz could make an appearance. Sheffield have three British Polish riders themselves and all raced well against The Hammers, Andy Angell returns to the track where he won his second British title in 2012.
The Yorkshire outfit will need to win to get their title challenge on track whilst the Welsh stars will want to start their first home season in the elite with a win.
Ipswich started the season with a home win against Newport and their rising young stars are coming of age plus experienced campaigners the Suffolk side could be in for their best elite season.
An away win here would really set them up, Josh Brooke notched a maximum in the Newport match and has a really good young back up of Ashley Hill, Richard Fellgate Lewis Roberts, Charlie Rumbold and Jamie Chittock with Adam Peck and Leon Mower giving the experience.
Poole were hit with a number of riders missing at Wednesfield, losing by 47. Greg Gluchowski may be racing for his Polish club this weekend as he is a first claim Swindon rider, and may opt to race in what is a crucial fixture in Poland.
The form of Poole's rising stars Leyton Glover, Aaron Smith and Hayden Chant will be vital to an intriguing looking fixture. Another big crowd the norm at Harbourside is expected.