Reigning European champions Spain suffered a shock exit in the group stage of the World Cup last summer and haven't had it all their own way in qualifying for France 2016.
Vicente del Bosque's side are second in Group C behind surprise package Slovakia, who are one of only two sides still with a 100% record at the halfway mark of qualifying, and next travel to Borisov to face Belarus.
They started with a trip to the lowest-ranked side in the group, Luxembourg, and were only able to draw 1-1 before suffering three straight defeats to Ukraine, Slovakia and Spain, scoring just once in those three losses.
A run of seven Euro qualifiers without a win was ended last time out, though, as Khatskevich's men went to Macedonia and came from behind to win 2-1 and move up to fourth in the group.
Still, they are five points behind third-placed Ukraine and will need to have a monumental second half of qualifying if they are to sneak into the top three.
Since that win in Skopje the Belarusians have been held at home by Gabon and lost 4-2 away to Russia in a pair of friendlies.
Recent form: DLLLW
Recent form (all competitions): LLWWDL
The reigning champions should still qualify with ease for next summer's finals, but the fact that they are not top of the group is an eye-opener.
Since the World Cup, they have lost four of their nine games and one of those defeats was in Zilina against the surprising Slovaks.
After that setback they have recorded three straight wins in qualifying without conceding a goal against Luxembourg, Ukraine and Sunday's opponents Belarus.
In fact, La Roja have kept a clean sheet in eight of their last 10 European Championship matches.
Del Bosque's men stayed 10th in the latest FIFA world rankings, 70 places above their opponents.
Recent form: WLWWW
Recent form (all competitions): WWLWLW
Between them, the duo have just 10 international caps and Morata might just get the nod after his strong end to the season with Juventus.
Belarus possible starting lineup:
Chernik; Shitov, Martynovich, Filipenko, Bordachev; Hleb, Kislyak, Dragun; Krivets, Putsila; Kornilenko
Spain possible starting lineup:
Casillas; Carvajal, Pique, Ramos, Alba; Koke, Busquets, Iniesta; Isco, Silva; Morata
Head To Head
Spain are used to playing Belarus having also been in their group in qualifying for the 2014 World Cup. On their last trip to Belarus in the sides' first meeting, Spain cruised to a 4-0 win in Minsk.
We say: Belarus 0-3 Spain
Belarus have been far from convincing in qualifying so far, but they will be buoyed after that win over Macedonia last time out. Still, Spain should prove far too strong and comfortably come through.