Four goals, the youngsters shining, Lacazette netting twice, Tierney superb and another clean sheet. A wonderful night and the perfect start to the new year for Mikel Arteta's side. Thank you for joining us on our live blog. Make sure to read Dan Mountney's player ratings shortly and we'll see you again very soon.

Full-time. West Brom 0-4 Arsenal

82'- CLOSE! Another devastating Arsenal attack sees Lacazette burst through, but neither Aubameyang nor Tierney can turn home his low cross. 0-4

80'- CHANCE! Arsenal break as Aubameyang races forward down the left, going outside and driving a shot at goal, but Johnstone keeps his effort out. 0-4

78'- CHANCE! A rare effort for West Brom as a cross leads to a scramble in the box before Austin turns the ball over the bar. 0-4

75'- CHANCE! It should be 5-0 as Tierney clips a cross in for Willian, whose wayward shot is turned over the bar by Aubameyang. 0-4

70'- Second change for Arsenal as the superb Saka is replaced by Willian. 0-4

64'- GOAAALLLL ARSENAL! If the game wasn't over at 3-0, it is at 4-0! Tierney turns provider this time as Aubameyang feeds him down the left, and the cross is on a plate for an unmarked Lacazette who turns home to put the Gunners out of sight. 0-4

60'- GOOOOAAAAALLLL ARSENAL! And it's three! Saka's cross creates the danger as Ajayi smashes the ball against his own post, then Smith Rowe has a shot saved before Lacazette turns the ball home inside the box. That should be that with half an hour still to play. 0-3

54'- CHANCE! Lacazette is played through and he tries to go round Johnstone, but the angle is tight. The goalkeeper gets just enough on the Frenchman's effort to take the pace off it and West Brom clear. 0-2

53'- First change for Arsenal as Maitland-Niles replaces Bellerin. 0-2

47'- GOAL DISALLOWED! West Brom think they've found a way back into the game as Pereira hits the post and Robinson turns home the rebound, but the flag eventually goes up for offside against the Brazilian. 0-2

46'- Back underway and West Brom make a change at the break as Austin replaces Diangana. 0-2

Fantastic first 45 minutes for Mikel Arteta's who have been in complete control. Two brilliant goals, the first a fantastic solo effort from Tierney, and the second a wonderful team goal finished off by Saka, have the Gunners on the verge of a third straight win.

Half-time. West Brom 0-2 Arsenal

44'- CHANCE! Lacazette does well to work an angle inside the box and fires a shot at goal from the left, but Johnstone is there to make another save before West Brom clear. 0-2

34'- CHANCE! Holding meets the resulting corner and forces another save from Johnstone. 0-2

33'- CHANCE! Fantastic link up again from Arsenal as Smith Rowe finds Lacazette in the area and his deflected cross is tipped over the bar by Johnstone. 0-2

28'- GOAALLL ARSENAL! OUTSTANDING FOOTBALL! Arsenal double the lead and they almost walk it in as the two youngsters link up superbly. Smith Rowe to Saka, back to Smith Rowe and then square for Saka to tap home. That was like the Arsenal of old. 0-2

26'- Heavy snow starting to fall at The Hawthorns now. 0-1

25'- Arsenal have the lead and are playing with confidence. The Gunners are looking dangerous whenever they go forward and working hard out of possession. Lacazette has the next effort as he blasts high and wide from range. 0-1

23'- GOAAALLLLL ARSENAL! It's been coming and it's a wonderful goal from an unlikely source. Tierney gets the ball on the left with very few options on, so he goes down the line then cuts inside before curling home a superb strike. That's just his second Premier League goal and it has the Gunners 1-0 up.

21'- CHANCE! Good opportunity for West Brom as Xhaka gives the ball away and the Baggies break. Phillips is played in over the top and he fires at goal, but it's straight at Leno who makes the save. 0-0

20'- Nearly a chance created down the left this time as Tierney drives in a low cross towards Lacazette, but West Brom hook the ball clear. 0-0

19'- All of Arsenal's good work is coming down the right as Bellerin breaks forward this time, but his cross is collected by Johnstone. 0-0

16'- CHANCE! Arsenal just inches away from taking the lead! Ceballos bends a wonderful pass into the right channel Saka who works the ball onto his left and curls in an enticing cross for Aubameyang at the far post, but the skipper can't quite stretch far enough to turn it home. 0-0

14'- Smith Rowe wins a free-kick on the right which Ceballos plays in. Johnstone comes to punch clear but can only get it as far as Tierney who blasts well over from about 25 yards. 0-0

12'- Arsenal having some joy down the right as Saka and Smith Rowe link up to win a corner, but it comes to nothing as West Brom head clear. 0-0

10'- CHANCE! Arsenal test Johnstone again as Lacazette finds Saka who works space to shoot inside the area, but the angle doesn't favour him and the West Brom goalkeeper saves comfortably. 0-0

8'- 66 per cent possession for West Brom so far, but Bellerin's shot still the only chance of the game for either side. 0-0

3'- CHANCE! First opening of the game for Arsenal. Aubameyang's ball from the left is nearly met by the head of Lacazette, but the ball drops to Bellerin who sees his powerful drive kept out by the feet of Johnstone. 0-0

1'- Arsenal get the game underway. 0-0

Teams are out at The Hawthorns. Kick-off is just moments away.

Kieran Tierney speaking to BT Sport about Arsenal's youngsters: "One of the first things I realised when I came here was the quality of the youngsters. They will be world-class for years to come.”

A win for Mikel Arteta's men tonight would see Arsenal climb to 11th in the Premier League table.

Arsenal come out to warm-up and of course, Kieran Tierney is in short sleeves and with his socks rolled down. I imagine he'll be applying the sunscreen before kick-off.

Latest from The Hawthorns on the snow situation. Referee Martin Atkinson is happy for the game to go ahead. The players will come out for the warm-up and they’ll reassess just before kick-off, but the snow is easing off.

The snow seems to be easing off at The Hawthorns now.

Mikel Arteta makes two changes to the team that beat Brighton on Tuesday as Alexandre Lacazette and Dani Ceballos replace Gabriel Martinelli and Mohamed Elneny, who both drop to the bench. David Luiz and Willian are also named among the substitutes.

West Brom subs: Button, Gibbs, Bartley, Peltier, Krovinovic, Harper, Grosicki, Austin, Diaby

West Brom team to face Arsenal: Johnstone, O'Shea, Ivanovic, Ajayi, Furlong, Diangana, Phillips, Sawyers, Gallagher, Pereira, Robinson

Arsenal subs: Runarsson, Luiz, Maitland-Niles, Elneny, Willock, Willian, Pepe, Nketiah, Martinelli

Arsenal team to face West Brom: Leno, Bellerin, Holding, Mari, Tierney, Xhaka, Ceballos, Saka, Smith Rowe, Aubameyang, Lacazette.

Snow continues to fall at The Hawthorns and the ground staff have been out clearing the lines. I wonder if Kieran Tierney will still wear short sleeves...

Plenty of snow is currently falling at The Hawthorns and it seems to be settling quite quickly on the surface. No word yet on whether there will be a pitch inspection with just over an hour till kick-off.

Arsenal's last win at The Hawthorns came back in November 2014 when a Danny Welbeck goal secured a 1-0 win for Arsene Wenger's side. Can Mikel Arteta's Gunners change that tonight?

Arsenal will be without Gabriel Magalhaes tonight after the Brazilian tested positive for Covid-19, while Thomas Partey is also missing as he continues to recover from a thigh injury. David Luiz and Willian are back after illness though, while Bukayo Saka is fit despite going off with a knock against Brighton. Reiss Nelson could also be available after missing most of the festive fixtures through injury.

Good evening Gooners and welcome to our first live blog of 2021 as Arsenal take on West Brom at The Hawthorns. Can Mikel Arteta's men make it three Premier League wins on the spin? Stick with us to find out!